Chrome vanadium steel forging, high hardness and high torque, surface plating, not easy to rustThe magnet is a ring around the tip of the shaft, can hold securely the screws and prevent fallen screws, makes one-handed driving very easy.The adjustable depth screwdriver bit holder allows you to adjust the depth of the screw depending on your job, never have to worry about the screw going to deep.Work great for drywall and deck board screws. Ideal for wood work, wood framing, carpentry, installing plywood subfloor and building cratesHex shank can be easily fit into power driver, drill and handheld screwdriver.Delivery Quantity: 4pcsPackage Contents: Only the above package contents, excluding other products.Size: Details as shown(Reminder: The size is measured manually, please allow 1-2 cm measurement error)color: blue(Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)