Features: Professional heat treated, durability, has high hardness, not easy to wear. Made of S2- alloy steel, very well made and tough as nails Fit for electric drills with speed regulating device, electric screwdrivers, hand screwdrivers. A long lifetime- of the drill bit is reached due to its durable construction and superior technology. High quality, long lasting and durable.Easy to take and use. The screwdriver set is strong magnetic, which helps to keep nuts and bolts stuck to them. Can improve your work efficiency. Specifications: Main Product: Cross Screwdriver Bits Set Material: S2- Alloy Steel Shank- Size : approx 6.35mm Lenngth:approx 65mm/2.56in 110mm/4.33in Quantity:3PCS Tip: Cross Note: No retail package. Please allow 0-1cm error due to manual measurement. please make sure you do not 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 includes: 3PCS Cross Screwdriver Bits