tender for pneumatic operated with reverse rotation wrench with1/2 square drive. technical specification -(i) square drive - 1/2 ( one and half inch ) (ii) free drive - 8400rpm. (iii) clutch type - pinclutch. (iv)working torque (fwd) - 34-420 nm. (v) max torque (rev) - 576 nm. (vi) length - 191 mm. (vii) weight - 2.3kg. make- chicago/ fuji/ desouter or similar .