This set of Husky Torque Limiting Extensions bars is not just your ordinary impact extension set. These 1/2 in. drive extensions are pre-set to a designated torque limit to prevent over tightening and damage to wheel lugs, studs, wheels, drums, and rotors. This 5-piece set covers 5 of the most common torque requirements for today's cars, trailers, and trucks. They are also color coded based on torque ranges for easy identification. The bars are designed for use with both cordless and pneumatic impact wrenches. They also feature a pin hole at the base of each bar for use with pin and O-ring for a secure attachment to drive tools, as well as chamfered lead-ins help to provide fast and easy placement onto drive tools and fasteners. These torque extension bars are a must have set for any DIY or professional garage.