All parts are made of Marine grade 316 stainless steel, Excellent seawater corrosion resistance and durable Value Collection - Quick-Release Pin: T-Handle, 1/4 Pin Dia, 1-1/4 Boat Accessory Marine Stainless Steel Pins 2 Pack Quick Release Pins - 316 Stainless Steel Marine Hardware | 9/32" Diameter X 3" Length Bimini Top Pins Boat Deck Hinges 316 Stainless Steel Quick Pin Aazon.co : X AUTOHAUX 6pcs Biini Top Quick Release Pin 1/4 Dia... Quick Release Pin for bimini top, boat tops and support poles, deck hinge etc , Diameter:1/4(6., 3mm), Overall Length:2(51mm), Usable Length: 1., 5(38mm) 4 Pcs Quick Release Pin, Diameter 1/4", Usable Length 1-1/2", Overall Length 2", Full 316 Stainless Steel, Bimini Top Pin, Marine Hardware. Please pay as soon as possible after winning an auction, this will allow for quicker shipping times! We accept returns Description: 1) Quick Release Ball Pin for bimini top, boat, deck hinge 2)Diameter:1/4(6., 3mm), Overall Length:2(51mm), Usable Length: 1., 5(38mm) 3) Marine grade 316 stainless steel construction, corrosion resistant and durable 4) Spring loaded ball in the tip of the pin holds it in place 5)Widely used in various shipbuilding, ship outfitting Package Includes: 4 Pcs Quick Release Pins, Diameter:1/4(6., 3mm), Overall Length:2(51mm), Usable Length: 1., 5(38mm)