This professional-quality Powerbuilt Dual Drive 3/8 Inch and 1/2 Inch Drive Micrometer Ratcheting Torque Wrench offers the convenience of both 3/8" and 1/2" drive options and the precision you need to properly torque those crucial fasteners. Simply dial in the desired torque from 10 to 150 ft. lbs., lock the setting in with the lock screw, then apply torque until the wrench clicks. The built-in ratcheting makes quick work of tightening or loosening fasteners too. Precision-built and affordable, Powerbuilt products meet or exceed ANSI standards.