Safety Pin, Double Wire Snap, Basic Material Steel, Material Grade Not Graded, Fastener Finish Zinc Plated, Pin Dia. 1/4 in, Usable Length 2 1/2 in, Dia. Tolerance +0.243/-0.248 in, Length Tolerance -0.250 in, Shank Length 2 3/4 in, Overall Length 3 in, Wire Dia. 0.091 in, Wire Shape Square