Features: These Strong Magnetic Bits are great tools used to drill various materials. With more stable performance, not easy to slide, the bits are designed with hex handle and the chip- clearing process would be better. Made of S2 highgrade alloy steel, integral induction hardening with strong wear resistance. Hardness reaches up to HRC5862 degrees, sturdy and durable. With strong magnet, Screwdriver bits bring professional, fast and convenient drill efficiency. 1 or 4-inch hex shank screwdriver bits are compatiable with electric screwdrivers, manual screwdrivers, T-handle 1 or 4" driver screwdrivers, corded drills, cordless drills, impact drivers and more. Specifications: Material: S2 Alloy Steel Type: 1 pc or 10 pcs(optional) Length: 60 or 70 or 90 or 127 or 150mm(optional) Shank: 1 or 4" Package Includes: 1X for Cross for Head Screwdriver Or 10X for Cross for Head Screwdriver note: Please allow 1-3cm error due to manual measurement. pls 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! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.