Pro.Fit Wire Worm

Installation tool helps route wiring through tight spaces

Item #: 042DM4533

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39 Reviews

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Pro.Fit's "Wire Worm" tool helps you route your wires during installation. Just tape your wire to it, then fish it under your dash or carpeting, or push it through holes or behind panels in order to pull the wire through to the desired destination. The 48-inch, rigid nylon Wire Worm stays straight, yet it's flexible enough to handle corners. And it won't scratch your vehicle's interior or existing wiring.

Warranty: lifetime.

Pro.Fit Wire Worm Reviews

Average Customer Review:

39 reviews
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Great little tool

Written By afhvengeance, Ohio on Wednesday, November 04, 2015

Crutchfield Customer Review (What's this?)

Great little tool for running wires behind panels.

Pros: Rigid enough to push past obstacles, flexible enough to get around large objects and corners.

Cons: Storing it when you're done is cumbersome.

Great Product

Written By Raymond, Montana on Wednesday, March 25, 2015

Crutchfield Customer Review (What's this?)

When I first took this out of the package, I thought it was going to be hard to use because it stays curled up. That actually makes it easier to use. Once I learned how to use it, it made my work a lot easier. Great product.

Pros: Well made, Easy to Use, worth the price

Cons: none

Handy tool

Written By wheeleze, California on Monday, March 16, 2015

Crutchfield Customer Review (What's this?)

Very useful for threading wires through your dash.

Installation nightmare

Written By MrBam, texas on Wednesday, February 18, 2015

Crutchfield Customer Review (What's this?)

This simple tool was a lifesaver. Person who had truck before me butchered the wiring to the point I did a clean new install with all new wires. This thing got through the door boots, through the dash, into the headliner (for my tweeters). I love this thing


Written By Anonymous, Divide, Colorado on Wednesday, February 04, 2015

Crutchfield Customer Review (What's this?)

This tool was very helpful when I was running the power cable from the battery to the inside of the vehicle.

Pros: Helpful

Cons: It always wants to be in a circular shape and most of the time I needed it to be straight.

A fishing tape that catches the big ones

Written By jpratch, Florida on Wednesday, December 03, 2014

Crutchfield Customer Review (What's this?)

This beats a metal fishing tape hands down. Being plastic, it is unlikely to damage any wires or other components in dark places while you are pushing it through. It is flexible enough to bend through reasonable accesses yet rigid enough to push wires when pulling seems impractical. The hole in the center of the tape makes pulling or pushing wires mush easier and reduces snagging. At four feet in length, it is adequate for most automotive cable pulling activities.

Pros: Just flexible enough. Plastic so almost no chance of an accidental short while fishing wire.

Cons: None in my mind


Written By Mark C, Hawaii on Wednesday, November 12, 2014

Crutchfield Customer Review (What's this?)

It's a pricey piece of plastic. It did come through in a few applications of my install but was still difficult. The hole notches at the ends were useful to run a bit of wiring through to secure it in place and run in tight spots. It's a bit wide for my uses and was a little too stiff for the areas I needed.

Pros: Works decently for its purpose Hole notches at the ends to secure wiring for running in tight areas Sturdy

Cons: A little too wide (at least for my needs) Too stiff for tighter bends.

Made it Much Easier

Written By Marie P., Jackson, TN on Tuesday, November 04, 2014

Crutchfield Customer Review (What's this?)

We really liked this. It made it so much easier the one or two times we needed it.

Pros: Inexpensive, easy to use, had a slot making it easy to attach the wire to it.

Great to Have

Written By TKB, Los Angeles on Thursday, October 16, 2014

Crutchfield Customer Review (What's this?)

This thing is great! It made my life easier running power cables, speaker wires, and rca cables through my car. It's going to stay in my family for generations to come.

Pros: It's great

Cons: The color is meh

Good tool to have for installers

Written By Luis, Houston tx 77084 on Sunday, October 05, 2014

Crutchfield Customer Review (What's this?)

It worked great for me ..

Pros: It works, helped me guide cables threw tight spots

Cons: Maybe were the cable loops the hole should be a little bigger I used a tight strap to tighten it worked fine

Get it

Written By JF, MO on Thursday, September 25, 2014

Crutchfield Customer Review (What's this?)

Made feeding the wires SO much easier.

Pro.Fit Wire Worm

Written By F, Detroit on Wednesday, September 10, 2014

Crutchfield Customer Review (What's this?)

This is a nice heavy piece of nylon to fish wiring . Much better than a hanger or strapping tape or... I've used it for several projects now. Well worth the price

Pros: easy to use

Cons: none

Pro.Fit Wire Worm

Written By Rock Freak, Atlanta, GA on Monday, June 30, 2014

Crutchfield Customer Review (What's this?)

Overpriced for a 3 foot piece of plastic. It did an ok job of helping me route wires.

Pros: Flexible

Cons: Expensive

Worked well

Written By Michael, PA on Thursday, May 29, 2014

Crutchfield Customer Review (What's this?)

Worked very well for running wires through boot on door; better than a wire hanger.

Pros: A must have for amp and speaker installs

Cons: Way to expensive for what is just really a cheap piece of plastic.

Excellent Gear

Written By Steve, Washington, DC on Tuesday, April 15, 2014

Crutchfield Customer Review (What's this?)

A must have for most car stereo installations. Threads wires under carpet like a charm.

Pros: durable

Cons: none

waste of money.

Written By Jeff, Lusby, MD on Friday, March 28, 2014

Crutchfield Customer Review (What's this?)

Total waste of money.

Pro.Fit Wire Worm

Written By Q, los angeles, calif on Monday, March 24, 2014

Crutchfield Customer Review (What's this?)

well worth it, had a similar item way back in the nineties , makes running wires a snap!

Pros: long, flexible

Cons: a little pricy for a very long but sturdy zip tie :)

garage door opener install

Written By momo, lake placid , fl on Tuesday, October 01, 2013

Crutchfield Customer Review (What's this?)

Did not need for satilite radio antena install, but needed to run wire from atic to mid wall opening for garage door opener install. Up in 120 plus degree atic in summer only not even 2 min and there was my wire worm. great product with many uses.

Pros: Many uses

Cons: non

Pro fit wire worm

Written By Doughboy1338, Troy, MI on Friday, August 16, 2013

Crutchfield Customer Review (What's this?)

Not really necessary. A coat hanger or old piece of wire could do the same thing. I had to cut it down some. I found it to be a little too wide.

Pros: None

Cons: A little too wide.

Pricey but good.

Written By Pass2srf, Honolulu on Monday, August 12, 2013

Crutchfield Customer Review (What's this?)

The Wire Worm tool worked perfectly. I would suggest you open the package, and let it "straighten out" overnight from the coiled up shape it is shipped in. But the tool did the trick. threaded my microphone wire through the dashboard easily. Only two stars because I paid this much for a $1 piece of plastic.

Pros: Works as advertised.

Cons: Expensive for what it is.

Unfortunately Did Not Help

Written By Rhfactor, Tucson, Az. on Wednesday, May 01, 2013

Crutchfield Customer Review (What's this?)

Unfortunately the Worm did not help in the application I was trying to use it for (not flexible enough). It may be helpful in the future for install under carpeting, etc. I was trying to run speaker wire from top dash area to side to get to door speakers, it was such a cramped area the Worm just wouldn't work. Had to get someone will very small hands to do the job.

Pros: Hopefully will be helpful for future installs.

Cons: Just about everything in the application I was looking for.

Goodbye wire coat hanger!

Written By Reginald, East Hartford on Friday, March 08, 2013

Crutchfield Customer Review (What's this?)

this product is excellent he would never think that something so simple make life so can run are you were with this without any issues or problems.

Not helpful

Written By Frank, DFW on Thursday, January 24, 2013

Crutchfield Customer Review (What's this?)

The pro fit wire worm came very stiff and hard to work with. It was not flexible and ended up not using it, not recommended.

Pros: none

Cons: very stiff, not flexible, unable to use

Simple device

Written By M1k3, Tracy, ca. on Wednesday, August 29, 2012

Crutchfield Customer Review (What's this?)

Simple and effective

Pros: Awesome

Cons: None

Complete Waste of Time

Written By PC, Houghton, MI on Tuesday, July 17, 2012

Crutchfield Customer Review (What's this?)

This is a short curly piece of plastic. Save your money and buy something else.

Wire Hanger Does The Same Thing - Cheaper

Written By Anonymous, Sumter, SC on Saturday, May 26, 2012

This does nothing a cheap wire hanger wont do. I found it less sturdy, too, for those long reach scenarios that require a bit of pressing to push through. All in all, I got back out my metal hanger, unwound it, folded the end to make a U shape about 6 inches long, put my wires inside the U, taped it securely at top and end, then pushed on.

Pros: None

Cons: Didnt handle the job

Cheap and great

Written By Bigjay2100, Manassas Park, VA on Wednesday, March 07, 2012

Crutchfield Customer Review (What's this?)

I bought this because I wasn't sure if I was in need of it or not and thought it couldn't hurt as it wasn't very expensive. When I got it and opened it, I was really kind of leary and I was ready to just write it off but man, did this help in my project and it is one sturdy little tool. I was able to pull cables through my entire truck with no problems and this tool worked everywhere.

Pros: sturdy, small and will fit anywhere

Pro.Fit Wire Worm

Written By Matt S, Scranton, PA on Tuesday, November 08, 2011

Crutchfield Customer Review (What's this?)

Great product! made of strong material and helped alot when installing touchscreen headunit.

Pros: Quality

Wire Worm

Written By DirkDiggler, DFW, TX on Tuesday, June 14, 2011

Crutchfield Customer Review (What's this?)

Works perfect for running wires through a dash or into doors. I was using a coat hanger before and this is much better because it's flexible.

Pro.Fit Wire Worm

Written By thomas, highland ca on Friday, March 18, 2011

Crutchfield Customer Review (What's this?)

great item relly gets wire through tight places.


Written By A.M., New York, NY on Monday, October 25, 2010

Crutchfield Customer Review (What's this?)

THIS THING IS FANTASTIC! wont rip, or stab a hole on your insulating boots like a wire hanger will, flexable but very sturdy, you can snake this thing almost anywhere! well worth the money i spent on it!!!!!

Pro.Fit Wire Worm

Written By Chris, St. Louis, MO on Tuesday, September 22, 2009

Crutchfield Customer Review (What's this?)

This Wire Worm tool is FANTASTIC. Yes, you could use a wire hanger or a giant zip-tie, but the wire worm is very long, completely smooth, and will not scratch the interior or snag while running it under carpet/door sills/seats, etc.

The only complaints I have are the price (less than $10 would have been great) and the fact that the tool needs to be straightened for a few hours (or overnight) before use.

I just stretched it out straight and put a heavy box on it overnight. The next morning, it was perfectly flat.

Lifesaver !!!

Written By Glenvall, Batesville, Arkansas on Saturday, June 06, 2009

Crutchfield Customer Review (What's this?)

Could not have installed my capacitor, amp, and speakers without it !!!

Rock On !!!


Written By Casey, Texas on Friday, June 05, 2009

This is a MUST HAVE for anybody installing an audio system in their car. It can find its way through anything, then you just tape whatever you need to pull through and pull it through!!! That simple...this tool made my installation SO much easier. Without it, I would have given up and went to an audio shop. Great Product!!!

Pro.Fit Wire Worm

Written By mike, San Diego on Tuesday, April 14, 2009

Great tool

Best car audio installation tool you could ever purchase!!!

Written By Tony, San Diego, CA on Tuesday, March 03, 2009

Crutchfield Customer Review (What's this?)

I agree with Ronald from Chicago, as well as everyone else that rated this product so high. This is by far the best car audio installation tool you could ever buy! I also purchased a couple of the door and panel trim removal tools, which don't get me wrong, came in very handy. However, this tiny (but very sturdy) tool saved me countless installation hours, kept me from breaking door and floor trim, and kept me from ripping up any of my interior carpet. This tool makes installation and routing of cables very, very easy and simplistic. Believe me and all the others that rated this product....This will be the best purchase you could ever make in regards to audio installation products. It made my installation experience so much easier and enjoyable!!!

Saves Tons of Time and Frustration - Great Tool

Written By Ronald, Chicago, IL on Thursday, November 06, 2008

Crutchfield Customer Review (What's this?)

This is the best car audio installation tool that I have ever purchased.
Incredibly simple, it's just a thin (but sturdy) curved piece of plastic. Don't
let it's simplicity fool you, however, it makes routing power cables,
interconnects and speaker wires so much easier. I can't tell you how much
time, frustration, busted knuckles and profanity this tool has helped me
save. It's probably the best money I've ever spent on car audio tools or
accessories. You'll have your new system up and running so much faster,
as well as being in a much happier mood, if you use this inexpensive tool to
complete your install.


Written By Fred, anytown, USA on Sunday, September 28, 2008

Crutchfield Customer Review (What's this?)

This thing is great if you're going to do any kind of wiring in your vehicle. I'm not one to write reviews for products, but this is one of the best tools I've ever bought. It saved me hours of installation time.

Awesome Tool!!!!

Written By KYFHO, Great Falls, MT on Saturday, March 15, 2008

Crutchfield Customer Review (What's this?)

This is one of the best tools I have purchased for car audio installation. It
made routing my speaker wires through the stock door jam a piece of
cake. It also came in really handy for routing wire under the carpet. I wish
I had bought one of these years ago. A must have for anyone who installs
car audio.

Hands-on research

What's in the box?

  • 1 Wire fish tool

Product Research


Overview: The ProFit DM-45-33 Wire Worm is a specialized tool to assist you in routing wires under the dash cavity, under carpeting, above headliners or through your vehicle's firewall. It is 0.385" wide x 47.875" long and made of nylon that is rigid enough to follow a line, yet flexible enough to turn corners without collapsing. It will not scratch or cut your vehicle's interior or wiring and will not harm any components that it comes in contact with. You can either thread your wires through the 0.125" x 0.25" hole at either end of Wire Worm or use electrical tape to secure your wires to the end of the Wire Worm.

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Product reviews from the Crutchfield Labs

Installer's Toolbox #2: Pro.Fit Wire Worm
by Crutchfield Writing Team

My very first accessories post was about the S&G wire stripper . I've decided to retroactively make it the start of a series. With "Installer's Toolbox" I'll talk about...

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Searches related to the Pro.Fit Wire Worm Installation tool helps route wiring through tight spaces