Ratchet torque wrenches with slip mechanism, for right-hand and left-hand tightening with 1/4" hexagonal drive bits DIN 3126 Form C 6.3. When the set torque value is reached, the tool locks, consequently it is not possible to apply excessive force Audible and sensitive click when the set torque values are reached The Torque-Lock function also allows the tool to be used as a standard ratchet wrench.