This damaged screw extractor set and stripped bolt remover are constructed of durable high-quality steel (HSS 4341), screw extractor kit with hardness of 63-65 HRC for extra durable, and corrosion-resistant, resists the impact of high-speed operation.With forging process to integrated mechanical property and long service live. Damaged screw extractor 12pcs set suitable for mechanics, electricians, , handymen, engineers, , roofers, technicians, outdoorsy men, etc and easy out all sizes and most screw heads: , slotted, square, star and pozi. There are also rusted, cracked, damaged or peeling damaged such as screws, studs, , fasteners or nuts. The water pipe remover kit can also be completed.Ergonomic design, highly suitable for machinery repair work. The screw extractor is simple and easy to operate, Step 1: a drill bit that is a bit smaller than the damaged screw, then use the drill/polish bit to a reverse run to pull out and drill down to make a clean hole. : switch the drill to the pull out bit, and Use a downward pressure (and slow speed) to let the puller head "drill" into the damaged screw, the bolt water pipe extractor is equally simple to use, use the drill to a deep hole in the bolt. A really practical gadget gift for men, damaged screw extractor set can work for both engineering and home. 6 pcs screw extractor set and 6 pcs bolt extractor set,The precision stripped screw extractor set with the specifications of 0, 1, 2, 2, 3, 4, The easy out bolt extractor set comprises 6 pieces sizes; for 3/4 inch -1 inch , 9/16 inch -3/4 inch , 7/16 inch -9/16 inch , 5/16 inch -7/16 inch , 1/4 inch -5/16 inch , and 1/8 inch -1/4 inch . and Quickly remove common sizes of damaged, broken or stripped screws.screw remover and extractor efficient and convenient to connect with most power electric drill adapters, screwdrivers, manual sockets. : Metal colour: Gold+Black Package Contents: 6 x Screw Extractor Set 6 x Bolt Extractor Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.