About Heavy Cleat 36 inch - set one 36 inch wall cleat three 2 1/2 inch cleats for the art each cleat is 1 1/2 inch tall and 1/4" thick Wall standoff is 1/4 inch Heavy cleats for hanging objects over 100 pounds High strength aluminum, heat treated to T6 Aluminum cleats can be used for indoor and outdoor installations A Heavy-Duty Cleat Hanger set includes one long 36 inch extruded aluminum cleat that is mounted on the wall and three short 2 1/2 inch cleats with a matching profile (shape) that are mounted just down from the top edge of the back side of the object being hung. Pre-drilled 7/32" holes in cleats will accept up to a #10 pan-head screw. Holes are 8 inches on center. Related Content What is a French Cleat Hanger and Why You Need ThemHow to Choose the Proper Aluminum French Cleats