3-1/4" Breakaway Hinge" 

Compatible with all sport/diver (Part #s 19802, 19803, 19804, 19833, 19834) and the bass boat ladder (model # 19812) mounting hardware. Made of anodized aluminum, the hinge features a breakaway pivot lock that shears a nylon bolt allowing the ladder to ride on the top of the water. A replacement nylon bolt is included. Shown with required face plate and hinge pin which are included with 99180 standard mount. 99180 Mount included with each ladder.