General description Neilsen 5pc 1/2" Dr Torque Limiting Sticks Socket Extension Bars are designed to provide consistently accurate torque for your fasteners when used with an impact wrench. This set includes five color-coded extension bars, each marked for specific torque limits. Technical specifications Material: Chrome-molybdenum steel (CR-MO) Length: 8 inches Torque limits: 65, 80, 100, 120, 140 ft-lbs (90, 110, 135, 160, 190 Nm)