Features:* The striped head has anti-slip function. It can remove all common sizes of damaged or peeled screws.* Screwdrivers have magnetism, can easily and quickly catch the screw and repair it to prevent the drill bit from slipping and improve work efficiency.* These screwdrivers are made of S2 material, adopt advanced alloy steel, induction hardening; It has strong wear resistance, impact resistance, strength and durability* Lightweight, small size and compact design. You can take it with you and use it for homework, telecommunications, automotive, or mechanical work.* Suitable for general sizes and all types of broken bits. A universal chuck that fits most electric hand drills. Remove broken screws or drill holes in one step. Specifications:Product Name: Anti-slip Batch HeadMaterial: S2 High Alloy SteelOptional Length: 90mm/150mmShank Diameter: 6.35mm (1/4 Inch) HexColor: BlueMagnetic: YesSuitable for: Cordless Drill, Electric Hand Drill, Hand Drill, Wind BatchQuantity: 3 PcsPackage Contents:3 Pcs. Non-slip Batch HeadNote:1. Transition: 1cm=10mm=0.39 inch.2. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.