Proto has added to its line of Electronic torque wrenches three new Fixed Ratcheting Head models. The new wrenches accept standard Proto sockets, and come in ¼”, 3/8”, and ½” drive versions with torque ranges from 25 in-lb  (2.8 Nm) to 250 ft-lb  (339 Nm).  Proto® Fixed Ratcheting Head Torque Wrenches are accurate to within +/- 2% of indicated value in BOTH directions (compared to 4% clockwise and 6% counter clockwise on mechanical models). This broad accuracy range extends from 10% to 100% of Full Scale. In addition, ninety-nine "on-board" memory storage locations help improve efficiency when taking multiple torque readings.
The fixed ratcheting head features a robust 24-tooth design with a 15° arc swing, an alloy steel drive gear for strength and durability, a low profile design for easy access, and a reversing lever design to ease one-handed operation.
The torque wrenches come with many of the same features and benefits as Proto’s existing electronic torque wrenches.