Features: 1.Perfect for removing stubborn screws and broken or damaged bits, studs, etc. 2.Cuts off rusted, cross-threaded or rounded-off nuts without damaging bolt threads. 3.Forged and hardened chrome-vanadium Steel for long life. 4.Suitable for most standard variable-speed bits. 5.Portable plastic box for easy to carry. Specification: Features:_x000D_ _x000D_ Perfect for removing stubborn screws and broken or damaged bits, studs, etc. _x000D_ Cuts off rusted, cross-threaded or rounded-off nuts without damaging bolt threads. _x000D_ Forged and hardened chrome-vanadium Steel for long life. _x000D_ Suitable for most standard variable-speed bits. _x000D_ Portable plastic box for easy to carry. _x000D_ _x000D_ Specification:_x000D_ Material: HSS4241_x000D_ Color: Silver_x000D_ 5 pieces screw extractor kit:_x000D_ Used to remove items with shear heads or circular grooves _x000D_ Turn the extractor counterclockwise to tighten and loosen the broken studs in the hole._x000D_ 5pcs/set 40CRV steel extractors_x000D_ Portable plastic box_x000D_ Size:_x000D_ No.1 - 3mm-6mm_x000D_ No.2 - 6mm-8mm_x000D_ No.3 - 8mm-11mm _x000D_ No.4 - 11mm-14mm_x000D_ No.5 - 14mm-18mm_x000D_ 2 pieces nut splitter set:_x000D_ Used to remove damaged or corroded nuts without damaging the thread of the bolt_x000D_ Chrome-plate body_x000D_ Chrome-vanadium steel blade_x000D_ Nut size: 12mm-16mm and 16mm-22mm_x000D_ _x000D_ Package List:_x000D_ 12pcs/set * Nut Splitter Set PackageList: