Feature: 1. Chrome Vanadium Steel: The screwdriver bit is made of chrome vanadium steel, which is durable and has a long service life. 2. Manual Use: These drill bits can be used manually or with any small drill that can be driven by a 1/4in hex shaft. 3. Application: This is a set of bits that is very suitable for vehicle, computer and electronic maintenance. 4. Accuracy Machining: These accuracy machined drill bits can be fitted with screws correctly and protect the drill bits and fasteners from damage. 5. Safe Storage: The screwdriver set is packed in a storage box, which is convenient for safe store and carrying. Specification: Item Type: Security Screw Hex Bit Set Material: Chrome Vanadium Steel Purpose: Special Shaped Screwdriver Head Screwdriver Tool Screwdriver Shaft Type: Hex shank Screwdriver Shaft Size: 1/4in. Package List: 32 x Screwdriver Bit1 x Screwdriver Shaft1 x Storage Box