✔ HIGH QUALITY: Made from H.S.S. 4341#, durable to use. The hardness is 62-63HRC.
✔ APPLICABILITY: The 4 pieces extractor set works with any drills and different screw sizes or bolts. Great for stripped, broken, stuck, rusty or damaged screws removal. Grab damaged Fasteners with speed and precision.
✔ EASY TO USE: With screw removers, you can easily remove any stripped screws in 10 seconds or less. You'll never be slowed down or frustrated by a stripped screw or broken bolt.
✔ AJUSTABILITY: And speed can be changed in the opposite direction of rotation of the drill screw thread in conjunction.
✔ MUST HAVE TOOL: This set is a "MUST HAVE" tool for all Homeowners, Woodworkers, Mechanics, Artists, Hobbyists, etc.