Sealey torque wrench locking micrometer style 1 2 sq drive calibrated sealey premier stw201 chrome vanadium steel ratchet heads with flip reverse action and push through drive to allow torquing in both directions large composite handle grips with unique mechanism which locks adjustment in place once torque figure is selected calibration tolerance in accordance with bs en iso 6789 2003 scales graduated in both nm and lb ft wrenches are individually tested for 4 accuracy and each wrench i