... the advantages of the anti-cutting function of high-strength pins, the quick release function of ball lock structure and the high-precision function of alignment ... 10mm~150mm or 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 5,6,8 ... steel,Ally steel.carton steelMaterial of shank:stainless steel,Ally steel.carton steelBall qty:1,2,3,4 Release Pin BPI4- ...