The Martin Sprocket & Gear Click-type Micrometer Adjustable Torque Wrenches feature an aluminum knurled handle and easy-to-read laser etched dual scale (ft-lb and Nm). It has a +/-3 percent CW and +/-5 percent CCW accuracy, and according to the company, exceeds the ASME B107314-2004 accuracy range. The calibration certificate is included for 100 percent traceability. The torque wrenches are available in three sizes: 1/2" drive 36-tooth quick-release reversible ratchet, 3/4" drive 24-tooth quick-release reversible ratchet, and 1" drive 24-tooth quick-release reversible ratchet.