[Strong & ] Screwdriver bits are made of S2 alloy steel, with high hardness, rust and , wear , not easy to break, and can be used for a long time. [Magnetic Drill Bit] The hardness wrench drill bit up to HRC60 which can prevent drill bits from breaking and wearing. The hex drill bit has been magnetized, each side can accurately lock screw, and 't damage screws and screwdriver. [1/4 Inch Hex Shank] S2 steel screwdriver bits with 1/4 inch hex shank can be used with electric screwdrivers, hand screwdrivers, electric drills, combination tools and any standard drill. [Size & Package] The package includes 10pcs hex bits with different sizes, including 1.5/2/2.5/3/4/5/6/8/10/12mm. Multiple sizes and sufficient quantity can meet your different working needs, widely used for household tool repair. [Wide Application] Screwdriver bits are widely used for repairing cars, trucks, engines, motorcycles, , dashboards, computers, cable boxes, toys, appliances and consumer electronics, etc. Color: Silver Material: Chrome Molybdenum Steel Package Contents: 10Pcs x 1/4 inch Hex Bits Driver Tamper Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.