Features: 1.Anti Slip Screw Extractor Striped Head has anti slip function.It can remove all common sizes of damaged or peeled screws. 2.Strong Magnetic Head The screwdriver bits has strong magnetism, it can catch the screw easily and quickly, and fix it to prevent the drill bit from slipping and improve the work efficiency. 3. Material These screwdriver bits are made of S2 material, adopt advanced alloy steel, inductive hardening; It has strong wear resistance, anti-impact, tough and durable 4.Easy To Carry Light weight, small size and compact design. You can take it with you and use it for home, telecommunications, car or mechanical maintenance work. 5.Wide Compatibility Suitable for general sizes and all kinds of broken bits. Universal chuck that suitable for most electric hand drills. Remove broken screws or drill holes in one step. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement : Material:alloy steel Size: Total length:25/50/65/70/90/170/150mm Handle Diameter:6.35mm includes: 1/2 set x Drill Bit(7pcs) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.