The STEELMAN 1/2-Inch Drive Heavy-Duty Twin Hammer Impact Wrench with 2-Inch Anvil is ideal for standard and heavy-duty automotive and industrial use. The variable speed trigger provides you with optimum speed control of the powerful 7,000 RPM free running pneumatic motor that can generate up to 400ft-lb of torque. The twin hammer mechanism design is covered with a protective steel case to prevent accidental damage and delivers smooth and balanced yet hard-hitting blows to help remove fasteners with less jarring in the hands of the operator. The 2-inch extended anvil allows the driver to use flip sockets and have easier access to deep tire wells without requiring an additional extension bar and the rear mounted easy glide forward/reverse switch makes switching modes a quick and one handed task. Compatible with 1/2-inch square drive impact sockets, extensions, torque sticks, and accessories. The tool connects to standard 3/8-inch inner diameter compressed air lines through 1/4-inch NPT threaded inlet in the handle. Comes with a protective rubber boot that covers the tool's upper assembly from the rear of the wrench and over the hammer case to the base of the anvil.