Sunex 9702A 3/8-Inch Torque Wrench with Case All parts are heat treated, carbonized, quenched, and twice tempered to ensure long life and precise results Accurate within plus or minus 3-percent Nickel and chrome plated sandblasted shaft to reduce metal fatigue Crafted with CR-MO steel ratchet gears for increased lifespan Drive 10 to 80 foot-pounds