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