BETA Click Type Torque Bars 10-50NmClick type torque bars : square Drive Size : 9x12mm for right hand and left hand tightening accuracy: 3% scale increased by 60% for improved visibility and setting accuracy torque adjusting speed increased by 40% handle and lens materials resistant to chemical substances red colour of o ring indicates that wrench is unlocked and torque can be adjusted recalibration reminder shows time to recalibrate wrench (4 steps: 3, 6, 9 and 12 months)