Medium barrel delivers steady powerful blows Accepts popular.401 taper shank chisels Standard quick change spring safety retainer Polished aluminum one-piece housing and handle with heat treated alloy steel barrel and piston for long life Built-in steel air regulator A popular choice for muffler and pipe removal, body shop work, shock work and many other automotive applications Standard Accessory: Standard spring retainer (905146) Optional Accessory: Quick coupler retainer (408291)