If you're using an XS Power battery in your boat, you might need stud adapters to connect your boat's electrical system or components to the battery. This PN 588 kit contains two pairs of brass adapters to fit applications found on many boats: one 5/16" set and one 3/8" set. They feature M6 threads and come with stainless steel wingnuts that are built to last. These posts work with most XS Power 12-volt deep-cycle batteries, and you can also use them with XS Power's exclusive i-BAR battery fit system. Warranty: 1 year.