The Hazet Torque Testers, Nos. 7901E, 7902E, and 7903E, are designed to offer a reliable control aid for torque wrenches. The 7901E has a fixed internal 1/2" square socket and can measure torques between 7.37 to 258.15 ft-lbs. The 7902E has a fixed 27mm hexagon socket and measures from 36.88 up to 811.30 ft-lbs. The 7903E has a fixed 10mm external hexagon socket for smaller torque wrenches and comes with additional 1/4" and 3/8" adapters. It can measure 1.10 to 22.18 ft-lbs with a maximum tolerance of +/- 1 percent. The torque testers feature a large, easy-to-read LCD display with backlighting, a quick test function, an IP40 protection rating, and three measurement readouts.