Features: Made of S2 material to stiffen the electric drill bit set. Strong magnetic properties, excellent workmanship and high precision. Each precisely locked edge helps the screwdriver tool without damaging the screwdriver and screwdriver head. Convenient for you and meets your daily needs. Applies to both electric and manual screwdrivers. Specification: 100% brand new with high quality Material: S2 Alloy Steel Shank: 6.35mm Hex Shank Size: 25mm/50mm/60mm/70mm/90mm/150mm Package Included: 6 Cross Impact Screwdriver Bits Note: The colors may be a little difference for the different monitor display. Please check as much as possible to make sure the item is the one that you need. Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm