The Chicago Pneumatic Butterfly Impact Wrenches, Nos. CP7711 and CP7721, are available in 1/4" and 3/8" and weigh just 1.16 lbs while measuring 5.5" long and 1.5" wide. Delivering 80 ft/lbs of maximum torque in reverse, the wrenches can remove or tighten fasteners in difficult-to-reach applications. The forward and reverse butterfly lever is placed on the top to ease operation, while the built-in 180-degree air inlet swivel and the three-speed power regulator are positioned at the back of the tool. The Butterfly Impact Wrenches are constructed with an aluminium housing and a single-hammer mechanism.