Features: After heat treatments, it is highly durability, and is not easily worn. Upgrading Phosphate treatments: S2 high hardness steel + phosphate treatments, overall antirust Strong antislip magnetic head: Antislip head, strong bite, stable and nonslip thread; Strong magnetic, firm adsorption and more efficient operation. Straight and concentrics: Straight and concentrics, say goodbye to slipping, say goodbye to idling, high concentricity and improve work efficiency Conquers compactly Spaces with Extended Reach Specifications: Component:S2 alloy Length:Approx.150mm/5.9in 25mm/0.98in, 50mm/1.96in, 65mm/2.55in, 70mm/2.75in 90mm/3.54in 127mm/5inch; 8Option Type; Features:Magnetic Bit,6.35mm Hex Shank; Package Includes: Package A 7pcs/set Screwdriver Bit( 25-150mm) Package B 1pc Screwdriver Bit note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.