4. Strong and - Made of strong vehicle steel, which is wear , and with high hardness. Suitable for gypsum wall, woodworking, dry wall and more 3. Detchable magnetizer ring - Detchable magnetizer ring can adjust the depth through increasing/decreasing washers. 2. Limit The 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 1. Accurate Positioning - These drywall Messageioning help you fix the exactly in place without worrying about wobbling or misdirection. the process of twisting screws so you can work more efficiently and easily! 5. Wide Compatibility - Widely compatible with electric screwdrivers, manual screwdrivers, electric drills, hand drills, etc., for easy installation and removal. Suitable for maintenance and installation of equipment in Lower Leg industry, Manufacturer: Jnchdghwa