The BP307S is a low velocity powder actuated, single shot, 0.22 caliber tool which can be used to install 0.3 in to 0.315 in head drive pins and 1/4 -20 threaded studs, up to 3 in total length. The BP307S is designed for maintenance, residential and commercial contractors.Lightweight durable designRubber cushion comfort gripAutomatic cartridge ejectionSlim profile nose piece 5/8 in diameter able to access tight areasSimple to clean and maintain service in the fieldReplaceable piston buffer for overdrive protectionReplaceable piston and piston stop guideBuilt-in overdrive precision