07887 Features: -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.-Designed for use in concrete and structural steel applications.-Washer increases bearing surface against the material to be fastened.-16 gage metal washer.-3" shank length.-.145 shank diameter.-.300 head diameter.-15 per box.