ITEM NAME:Quick Release Pins 8 Mm (5/16 in.) Made of Stainless Steel 316 for Boat Bimini img *{margin:0;padding:0;.Quick release bimini top ball pin with Lanyard. Marine grade cast solid 316 stainless steel construction, corrosion resistant. Material: 316 Stainless Steel. Quick release pin for boat top deck hinge or boat jaw slide clamp bracket.