Manufactured in the UK in accordence to BSEN ISO/IEC 17025:2000. Quality and performance are assured with traceable calibration on each individual wrench. Re-calibration services available in UK, USA, ,Singapore, China, Australia,Reversible ratchet with a narrow engagement angle of 6 degrees,Quick and light adjustment with minimum effort over the entire scale. Robust safety lock prevents accidental adjustment,Ratchet head torgue wrench for general workshop, garage and tyre shop torque applications,adjustment over the entire scale and a robust lock to prevent accidental adjustment during use