Draper expert 12 square drive precision torque wrench 50 to 180nm draper expert 58139 expert quality with reversible ratchet head and locking preset action torque values are viewed via a window in the handle range 50 180nm accuracy 1774 overall length 520mm 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 58139 12 square drive preci