Features: These bits are magnetic, which can be fixed securely on screwdrivers, fastening electric screwdrivers, handheld screwdrivers, electric drills, air drills and so on. Hex Bolt Screwdrivers are made of S2 alloy steel, which is commonly used in high-hardness hardware. The magnetic bits are firmly fixed on the screwdrivers. Specification: Material: S2 Alloy Steel Bit Type: Five-Star Shank Type: 1/4 Hex Shank Size: T10 / T15 / T20 / T25 / T27 / T30 / T40 (50x6.35mm/1.97x0.25in) Color: Silver Quantity: 7pcs/set Note: No retail package. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Included: 1 x T10 Star Shaped Magnetic Screwdriver 1 x T15 Star Shaped Magnetic Screwdriver 1 x T20 Star Shaped Magnetic Screwdriver 1 x T25 Star Shaped Magnetic Screwdriver 1 x T27 Star Shaped Magnetic Screwdriver 1 x T30 Star Shaped Magnetic Screwdriver 1 x T40 Star Shaped Magnetic Screwdriver