[Chromium-Molybdenum Steel Material] The bolt nut extractor set is made of high-hardness chromium-molybdenum steel material, which are heat-dealing for durability. It has high visibility etched dimensions for quick identification. [Reverse Spiral Groove Design] The internal thread adopts reverse spiral groove design, which can bite downward for maximum. The surface is precision machined. Internal left-hand spiral design provides extra grip and faster striking speeds. Product: Name: Bolt Nut Extractor Set Material: Steel Color: Black Notes: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement. [Standard 3/8-Inch Drive Design] This damaged impact bolt nut remover tool eliminates to place a socket on the hex head before attaching the wrench for use. It adopts standard 3/8-inch drive, which makes screw extraction device compatible with hand tools, power tools, or pneumatic tools. [What You Get] The package includes 26pcs rusted screw extraction socket [What You Get] The package includes 26pcs rusted screw extraction socket [Widely Uses] This broken screw stud removal kit is used for removing damaged studs, bolts, socket head screws and accessories. It can be used with different square drive wrenches for wide application. _x000D_