ITW BRANDS 00809 .300 x 2-1/2-Inch Drive Pin, 100-Pack ITW Ramset powder actuated fasteners are specifically fabricated to meet the exacting requirements of toughness and durability that enable them to penetrate dense concrete and structural quality steel It measures 7/8" washer increases bearing surface against the material to be fastened It measures 2-1/2" shank length 100 pack .300" x 2-1/2" drive pin with washer Pins measure 2-1/2" in length with a .300 head diameter and .145 shank diameter Pins are tough and durable to enable them to penetrate dense concrete and structural quality steel