These are not your average hooks. Formed from 1" × 3/16" (25 x 4.75mm) flat steel stock, they are zinc plated for rust resistance and vinyl dipped to prevent scratching. The small hook is 5 1/2" (140mm) high, projects 2 1/2" (63mm) and supports 100 lb. (45kg) The medium hook is 6" (150mm) high, projects 4" (100mm) and supports 80 lb (36kg). The large hook is 8 1/2" (215mm) high, projects 5 3/4" (146mm) and supports 40 lb.(18kg)

Each hook has two 1/4" (6.35mm) diameter holes for mounting with screws or lag bolts.