... structure. that uesd in quick location, quick release and fastening. Taking the advantages of the anti-cutting function of ... pins, ball lock pins belong to the top fastening structure.quick release pins,ball lock pins,self lock ... 1/2 inch~6inchDiameter of shank:3/16,1/4,5/16,3/8,7/16,1/2,9/ ... 16,5/8,3/4,7/8,1(inch) or 5,6 ... steel,Ally steel.carton steelBall qty:1,2,3,4 Release Pin BPI4-NM1 ...