The Ramset 22 Hammer Shot 0.22 Caliber Single Shot Tool is a hammer-actuated tool utilizing 0.22 caliber loads. This tool is great for small DIY projects. The HammerShot can easily fasten up to 2 1/2 inch drive pins. Hammer actuated tool with a barrel design that allows for easy horizontal and overhead fastening, up to 2 1/2 inch drive pinsFor small DIY projects, such as fastening two by fours and furring strips to concrete in basements or room additionsImpact-resistant handle with contoured gripLarger strike nut than the HD22Fewer misses with large striking surfaceGreater comfort with impact resistant handle and finger grooves