Draper expert 38 square drive precision torque wrench draper expert 58539 the draper expert ratchet repair kit for 58130 and 58137 has reversible ratchet head and locking preset action torque values are viewed via a window in the handle range 5 22nm accuracy 1774 overall length 255mm full instruction manual and calibration certificate included with each torque wrench supplied in blow mould casemanufactured and calibrated to iso6789 1992 12 01 standardsold loose draper expert 585