The Weapons Armorer Sully Hammer Handle is used when installing hammers, providing better leverage when aligning the hammer under spring pressure. It can be used with most single stage, and two stage hammers, to include semi-auto, burst, and full-auto trigger systems. The Sully Hammer Handle is double ended. One end has a square pocket, and the other has a "L" shaped pocket. The L shaped pocket is designed to be used with Single Stage Hammers, on both Semi-Auto and Full-Auto type hammers. The square cut pocket is designed to be used with most 2-stage hammers. Several of the 2-stage hammers we have been able to use it on are from RockRiver, Larue, Schmid and Geissele (Keep in mind that not all 2-stage hammers have the same dimensions).To use the Sully Hammer Handle, simply install the hammer into the matching pocket on the end of the tool. Make sure that your hammer spring is on the hammer so it is winding tighter as the hammer is cocking rearward. Carefully position the hammer in th...