Mesee 50mm 5-Pointed Star Magnetic Screwdriver Bits Set - These are made of high-strength S2 alloy steel, good toughness, hard to rupture and wearproof. - Strong magnetic torx screwdriver bits, easy to suck the screws when using, improve your work efficiency - Exquisite workmanship, each edge can be accurately locked screws, no damage to the screw and the screwdriver head. - Can be used for installed in pneumatic screwdrivers, electric screwdriver, rechargeable drill, using the wind batch. - Ideal tool accessory, widely used for power tools, household appliances, precision instruments industry, furniture industry. Please Note: - Using the correct screwdriver bar, pay the less effort and can easily unscrew the screws! It will damage screwdriver and the screw if you use wrong sizes to screw. - Please allow 1-3mm errors due to manual measurement. - Welcome to contact us If you have any problem, we would like to help you deal with it. Specifications: Material: S2 Alloy Steel Overall Length: 50mm/ 1.97 inch Type of Shank: 6.35mm / 1/4 inch Hex Type of Head: Torx Star 5 Point Size: T10, T15,T20, T25, T27,T30, T40 Package Includes: 2 Sets x 7 Pieces Star Screwdriver Bits