Fixed square drives allow higher accessibility in width and height than ratchet inserts .Insert is fixed to the torque wrench by a spring-loaded retractable pin .Range covers from 9x12 to 27x36 receivers, from 1/4 to 1 inch square drives, from 30 N·m to 2,500 N·m max torque .Suitable for 7465, 74W9, 74W14, 74P9, 74P14, IZO-D, TAW9, TAW14, TAW24, TAWM9, TAWM14, TAWM24 wrenches .Sizes with * in torque length require a target torque setting calculation