Our LARGE mount magnets are perfect for home or professional use. Fully rotatable top portion makes postioning easy. Mounted Horizontally will hold up to 19 lbs. Mounted vertically will hold 15 Lbs + Same source of the World's strongest magnets sold by the BIG BRANDS, female owned business. These are not your mama's magnets! Strong enough to be rated as a "permanent magnet" but can easily moved or adjusted. Perfect for Cord Managment behind your desk , or in your electrical box. Ideal for DIY projects - no drilling thorugh steel required! They stick to Railings, Drop Ceiling Frames, Pipes, Beams, and any other metal surface. Get a big pack, you'll want to use them everywhere.