Durable: The hex shank screwdriver bit holder is made of chrome vanadium steel, high hardness, rust and corrosion resistance, strong and durable. The magnetic tip effectively holds the screw straight. Adjustable: Our screwdriver bit holders are height adjustable. The magnetic drill bits can fix the screws at a predetermined depth, allowing for precise work with drywall screws. Features: The strong magnetic tip can fix the drill bit, making it easy to pick up and hold the screw. It is suitable for 1/4 inch Phillips drills. It can drive drywall screw quickly and accurately. Specifications: 1/4 inch hex handle can be easily inserted into electric screwdrivers, drills and handheld screwdrivers. Wide Usage: Suitable for decking, drywall, particle board or plywood, wood framing, plywood subfloor installation, etc. Great as a daily tool for indoor and outdoor use.