The SUNEX Tools Heavy Duty Long Barrel Air Hammer Kit, No. SX2303K, delivers 2,300 BPM of hammering for bolt cutting, driving pressed pins, and knocking loose ball joints and suspension components. The hammer provides high impact blows for heavy duty tasks with an 3.75" stroke length. The patented damping system minimizes vibrations, reducing user fatigue and allowing longer work sessions. Active air spring technology for shock absorption absorbs shock. Additional features include a quick-change chuck which accepts standard 0.401" shank chisels, precision-machined steel barrel, and patented chamfer design.