The 4 in. Open MIDI Hook uses patented technology to securely hold your heaviest tools and equipment up to 25lbs on thin steel surfaces. This multi-purpose, heavy-duty Gator 4 in. Open Hook is designed to keep shovels, rakes, power tools, extension cords, hoses and other heavier equipment and tools right where you need them. Gator Hooks use a proprietary magnetic technology with over 100 patents that allow them to hold exponentially more weight than traditional magnets to all of the steel surfaces commonly found in the workshop or garage.