2 Sets of star screwdriver bits in 7 different size(7 pieces each set) can meet your various needs Type of Head: Torx Star 5 Point; 7 Size: T10, T15,T20, T25, T27,T30, T40; Overall Length: 50mm/ 2 inch Made of high quality S2 steel for durability, ideal tool for repairing household appliances, precision instruments, furniture Strong Magnetic Exquisite workmanship, each edge can be accurately locked screws, easy to suck the screws, no damage to the screw 5-Pointed Torx Screwdriver Bits with 1/4-Inch Hex Shank, suitable for electric screwdrivers, hand screwdrivers, electric drills, air drills and so on 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