【Size】19mm nut driver, 65mm (2.5-inch) total length. 【1/4' Hex Shank】Universal 1/4 inch hex shanks fit a variety of quick-change chucks and drill, driver, or screw-gun. 【Material】Heat treated chrome vanadium steel construction with a sandblasted finish for increased hardness and corrosion-resistant. 【Magnetic】Magnetic nut setter can be used with an impact/bit driver or hex socket ratchet to securely grab nuts and fasteners for easy installation or loosening/removal. 【Application】Widely used in household DIY, woodworking, professional machine repairing, etc.