3. Detchable magnetizer ring - Detchable magnetizer ring can adjust the depth through increasing/decreasing washers. 4. Strong and - Made of strong vehicle steel, which is wear , and with high hardness. Suitable for gypsum wall, woodworking, dry wall and more 1. Accurate Positioning - These drywall Messageioning help you fix the screw exactly in place without worrying about wobbling or misdirection. the process of twisting screws so you can work more efficiently and easily! 2. Limit The Screw Depth - Magnetic collar design limit individuals the penetration of screws to the wall and prevent individuals damage to walls by twisting screws overly. Make your work hassle-free 5. 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 Lower Leg industry, Weight: 0.19180216794 Pounds, Manufacturer: Kueohse