Chrome vanadium steel forging, high hardness and high torque, surface plating, not easy to rust The 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. Work for 1/4x1 Phillips Bits 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 crates 1/4" hex shank can be easily fit into power driver, drill and handheld screwdriver. Packaged included: 3pcs Screw Driver Bit Holder with 3pcs PH2 Drywall Insert Bit Material: Chrome Vanadium Steel Color: Blue Size: 60mm x 14mm Hex shank: 6.35mm( 1/4" ) Fir for: 1/4" shank dirver bit Package Included:3 x Screwdriver Bit Holder 3 x PH2 Screwdriver Bits Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia