Description: Accurate Positioning: These bits help you fix the screw exactly in place without worrying about wobbling or misdirection. Speed up the process of twisting screws so you can work more efficiently and easily! Limit The Screw Depth: Magnetic collardesign limits the penetration of screws to the board and prevents damage to walls or boards by twisting screws overly. Make your work hassle-free. Magnetic & Non-slip: The magnetic and non-slip design allows the screw to attach to the bit without falling off, making your work easier and effortless. Strong and Durable: Made of strong chromium vanadium steel, which is wear resistant, durable and with high hardness.Suitable for gypsum board, woodworking board, dry wall and more. Wide Compatibility: Widely compatible with electric screwdrivers, manual screwdrivers, electric drills, hand drills, etc., for easy screw installation and removal.Suitable for maintenance and installation of equipment in home furnishing industry Specification: Material: Chrome Vanadium Steel Size(optional) Length: 25mm / 50mm(9.84/19.7inch) Interface to Electric Drill/ Screwdriver: 6.35mm/0.25” Hexagon Shank Compatible equipment: electric hand drill / rechargeable drill Purpose: tighten or remove screws Package Includes: 5pcs/Set Positioning Screwdriver Bits Head Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!