Features: Hexagonal shank designing with tightly fit ensures stability. With strong torque, effectively preventing damage. Magnetic designing, easy to replace quickly, magnetically adsorbed, and not easily dropped. Quality alloy steel, with high hardness, wear resistance, durability. 50mm/100mm/150mm length optional, suitable for various electric tool, hand drill, charging screwdriver and more. Specifications: Component: alloy steel Type: refer pictures to selection please Length: 50mm, 100mm, 150mm (optional) Also 100mm 11pcs/set and 50mm 12pcs/set avaliable to choose Size: refer to pictures Package Includes: 1Pc Magnetic Hex Screwdriver Bit or 11pcs/set or 12pcs/set(optional) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.