The cylinder body and handle are made from an aluminium alloy. The piston rod and springs are made form alloy steel. All fasteners are stainless steel. The tool chuck and retainer are hardened alloy steel.
The tools are operated by activating a trigger valve located in the pistol grip handle. This valve releases the air supply, driving the piston rod forward to impact against the tool bit. The piston rod return stroke is made by the return spring assembly. The tool bits are held by a hand opera ted, spring loaded, and quick release safety retainer.