Feature:1. Made of high-quality high-speed steel 4241, it is high hardness, durable and wear-resistant, which can help you easily remove the damaged screws.2. The screw extractor is suitable for removing damaged or damaged bolts, screws, accessories, etc.3. The kit includes 20 different sizes of screw extractors, which can meet all your needs, and is suitable for screws or bolts of any size.4. Simple use, no need to change the extractor or or adjust the groove, and is suitable for most electric hand drilling.5. It is suitable for hex bolts, mechanical screws, square head screws, wood screws, hex screws, sheet metal screws, etc.Specification:Condition: 100% Brand NewItem Type: Screw Extractor SetMaterial: High-Speed Steel 4241Weight: Approx. 160g / 5.6ozPlastic Box Size: Approx. 13.1x10.2x3.4cm / 5.2x4.0x1.3in .Package List:20 x Screw Extractor (Ex#1 - #10, Dr#1 - #10)1 x Magnetic Extension Bit Holder1 x Socket AdapterNote:It is best to use electric hand drill, can not be used the hammer drill mode! Must be low speed during use.