This Ruland preset torque wrench and hex bit bundle includes part number TW:BT-1R-1/4-48.0 and THX:BT-1/4-2.5MM. The TW:BT-1R-1/4-48.0 is a slip type torque wrench with a T-handle. This torque wrench has a 1/4" drive and is preset to 48.0 lbs-in (5.42 Nm). Upon reaching the specified torque value of 48.0 lbs-in (5.42 Nm), the torque wrench automatically releases and resets. Ruland THX:BT-1/4-2.5MM is a 2.5 mm socket bit with overall length of 1-7/8" (48 mm). It is designed to fit Ruland supplied torque wrenches with a 1/4" drive. THX:BT-1/4-2.5MM is manufactured from chrome plated steel for durability and not meant to be used with power tools.