The Tiger Claw Pneumatic Installation gun is the fastest way to install hidden fastening clips into grooved decking. The tool features a unique nose piece that holds clips in the correct position every time, firing a screw nail (Scrail) through the clip into the joist - fastening the deck board to the joist in one step. On average, this installation gun will install about 400 sq. ft. of decking in an hour. FastenMaster is proud to offer a full lifetime warranty on this tool.