Check the listing for details. 5pcs H3 Flat Hex Screwdriver Bit 3mm Tip 1/4" Shank 2.6" Long Black Phosphate. Color: Black, Condition: New. Listed at 10.33 USD. Metric Flat Hex Head Size: H3 (3mm)Hex Shank Size: 1/4"Overall Length: 65mm (2.6")Material: S2 SteelFinish: Black PhosphateHardness: HRC56-60 (The recognized stable hardness is around HRC60.)Color: Black, GreenPackage Content: 5pcs x Flat Hex Head Screwdriver BitFlat hex screwdriver bit is made from specially heat-treated S2 steel for superior strength, hardness and durability. The black phosphate coating provides corrosion resistance and reduces friction for smoother operation and longer screwdriver bit life.The hexagonal head of the screw driver is magnetized for easy use. Flat hex driver with magnetism can stably absorb the screw vertically or obliquely, making it easy to fix the screw, especially in a small space. Precision CNC machined hex head, precise appearance, reduces head wear during high-intensity tightening operations.