Order this Ramset 1-1/2 in. Drive Pins with Washers for delivery to your job site. Use with Ramset powder actuated tools for fastening applications in concrete and steel. For attaching 1/4 in. and 1/2 in. plywood to concrete. Tough, durable pins are able to penetrate dense concrete and structural-quality steel. Washer increases bearing surface against material to be fastened.