TRAC Isolator Bolts – 8 PackInstall your anchor winch, trolling motor and other accessories from the top of your boat deckGreat when you can’t reach under the deckProtects your boat from vibrationsEasily installed in a 1/2″ hole with Phillips head screwdriverBolts are marine-grade 316 stainless steel for the ultimate in corrosion protection in fresh or salt water