General description US PRO Impact Extension Bar Socket Set is specifically forged for use with powered impact tools, ensuring durability and reliability during heavy-duty applications. Technical specifications Material: Precision cold-forged, hardened and tempered chrome vanadium steel Coating: Industrial phosphate-coated for tough corrosion resistance Sizes included: 75mm, 125mm, and 250mm Drive size: 1/2'' Other information Features a side wall hole for ball or pin locking to the tool Comes with a warranty