Features: 1Multiple Screwdriver Bits Size: This screwdriver bit is available in 25mm, 50mm, 65mm, 70mm, 90mm, 125mm, 150mm, which can meet your different needs. 2Durable Screwdriver Bits: This screwdriver bit has a sleek, wear resistant surface and can be used for 1/4 thread electric and manual screwdrivers, drill screwdrivers and other tools. 3Excellent Alloy Steel: This screwdriver bit is made of excellent quality alloy steel, with high hardness, and wear resistant for a long service life. 4Hex Shank Screwdriver Bit: This screwdriver bit has a hex shank and has a large contact area with the screwdriver, which results in more friction and makes it easier to unscrew the screws. 5Magnetic: This screwdriver bit is magnetic, it can suck the screws when you use it, so that the screws won't fall off during the screwing process, more energy saving and easy to operate. Specification: Item Type: Screwdriver BitsMaterial: Alloy SteelSize: Approx. 25mm/0.98in, 50mm/1.97in, 65mm/2.56in, 70mm/2.76in, 90mm/3.54in, 125mm/4.92in, 150mm/5.91inUse: Screwdriver BitsWeight: Approx. 117g/4.13oz Package List: 7 x Screwdriver Bit