WUZHOU Adjustable Screw Depth Screwdriver Bit Holder Magnetic Steel Screwdriver Drywall Bit Hex Shank The adjustable depth screwdriver bit holder can set screws in straight and to a predetermined depth, allowing for accurate working with drywall screws. Strong magnetic tip can hold the bits and convenient pick-up and retention of screws Versatile Use: Use for deck building, wood framing, installing plywood subfloor, building crates, etc.high hardness and anti-rust, giving you long lasting and maximum durability. Color: blue+red Size: Length 67mm Quantity delivered: 4 pieces Warm prompt: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding 3. Only the above package contents, excluding other products.