ITW BRANDS 09176 .300x3-Inch Ram Drive Pin, 100-Pack Coated to improve corrosion resistance in treated lumber and other applications Washer increases bearing surface against the material to be fastened 100-pack .300 in. X 3 in. Ramguard drive pin with washer Pins measure 3 in. With a .300 in. Head diameter and .145 in. Shank diameter Pins are tough and durable to enable them to penetrate dense concrete and structural qualitysteel 100 pack .300" x 3" ramguard drive pin with washer Pins measure 3'' in length with a .300 head diameter and .145 shank diameter Ramset ramguard drive pins are designed to penetrate dense concrete and structural quality steel