Features Included Parts: Including Screw Extractors, Hex Shank Twists Drills, Screwdriver Bits And 1/4 Extension Rod, Various Sizes Meet More Requirements. Screw Extractor: This Screw Extractor Kit Can Help You Easily Remove All Common Screws, Specifically Designed for Damaged Or Peeled Screws. Twist Drills: Including 5pcs Twists Drills of Different Sizes, Standard Hex Shank Design, Which Can Be Easily Installed on Electric Or Hand Tools. Metal Material: These Parts Are Made of Chromium Vanadium Steel, with High Hardness, Wear Resistance, Impact Resistance, And Long Service Life. Storage Box: This Kit Is Equipped with A Plastic Storage Box to Provide Stable Fixation And Good Protection for These Parts, And to Prevent Loss. Specification: Item Type: Screw Extractor Set Screw Extractor Threading Diameter: 5-7mm / 0.2-0.3in 6-8mm / 0.24-0.31in 8-11mm / 0.31-0.43in 11-14mm / 0.43-0.55in 14-18mm / 0.55-0.71in Hex Shank Twist Drill Diameter: 2.5mm / 0.1in 3.5mm / 0.14in 4mm / 0.16in 5mm / 0.2in 8mm / 0.31in 8PCS Screwdriver Bits: CR-V 4, CR-V 6, CR-V PH1, CR-V PH2, CR-V PZ2, CR-V H4, CR-V H5, CR-V H6 1/4 Interface Self Locking Screwdriver Bit Extension Rod Package List: 5 x Screw Extractors 5 x Hex Shank Twist Drills 8 x Screwdriver Bits   1 x Bit Extension Rod 1 x Storage Box Package List 5 x Screw Extractors 5 x Hex Shank Twist Drills 8 x Screwdriver Bits 1 x Bit Extension Rod 1 x Storage Box