Features1. High quality material: Made of high-quality 40CR material, it helps ensure the maximum durability of the impact screwdriver. The black oxidation treatment gives it strong strength and extends the service life of the bolt remover.2. High strength and impact force: The bolt and nut remover is made of high hardness chrome molybdenum steel, and the reverse spiral groove design can provide maximum gripping force by interlocking.3. Different sizes: Suitable for damaged bolts with a head size of 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 19mm, 21mm, 22mm, 24mm, 24mm, and 27mm.4. Easy to work: Its 3/8 "Drive can be used with all standard ratchet wrenches, impact wrenches, sockets, and power tools. It can be driven with metric wrenches or sockets. The bolt remover can also be used for screw heads and studs.5. Metric and Imperial Sizes: The nut remover is precisely designed to easily remove damaged bolts, nuts, and screws, even if they have been stripped or frozen. Its quality is trustworthy, making every task faster, safer, and more effortless!SpecificationMaterial: SteelProduct size: 9mm 10mm 11mm 12mm 13mm 14mm 15mm 16mm 17mm 19mmWeight: 350/580GPackage Include:10PCS extractor