The hanger consists of two aluminum interlocking brackets modeled after the French cleat featuring a built-in level which ensures an accurate installation. The aircraft grade aluminum brackets will not corrode and can be used indoors or outdoors. The system uses small nails which leave pin size holes and a foam back to protect walls from scuffs and marks. Once installed it can be adjusted left or right. Nail hole punched every 1 in. Holds 10 lb per nail used. Patented. Hang it level every time™.