Helpful, but cheaply made
Crutchfield Customer Review (What's this?)
First, don't use the screws that come with the kit. I sheared off three just trying to screw into a stud. Second, the plastic used on these brackets is very brittle - the first strap I tried inserting into bracket snapped. Lastly, simply mounting to a stud to the left and right of the bracket isn't strong enough, as the straps are very flimsy. I ended up adding braces above and below the bracket to mount additional straps. Nice to have for aiding in drywall installation, but very overpriced for what you get.