Features: brand new and high quality ● 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：Magnet collar design limits the penetration of screws to the board and prevents damage to walls or boards by twisting screws overly. Make your work ● Magnet & Non-slip： The magnet 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 tool steel, which is wear resistant, durable and with high hardness. Suitable for gypsum board, woodworking board, dry wall and more. ● Wide Compatibility： Widely for 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. Specifications: Material: Tool steel Size1: Approx.25x15x6.35mm / 0.98x0.59x0.25inch Size2: Approx.50x15x6.35mm / 1.96x0.59x0.25inch Package Includes: 5xScrew Batch note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!