... provide quick release pin(ball lock pins)--a kind of special fastener HKS can provide you speedy and safe ... self lock pins,positive lock pins,detent pins,lock pinsstandard of ball lock pin:Handle type: T handle pins , ... ~150mm or 1/2 inch~6inchDiameter of shank:3/16,1/4,5/16,3/8,7/16,1/2,9/ ... ,Ally steel.carton steelMaterial of shank:stainless steel,Ally steel.carton steelBall qty:1,2,3,4 Release Pin BPI4 ...