These standard series heavy duty 1/4" steel concealed shelf brackets can be used for floating shelves, work stations or heavy duty shop shelving. Designed to be attached directly to the wall stud with the included 3/8" - 18 x 3" carriage bolts. The 90º straight bracket and easily be hidden with a lip around your shelf to give the look of a floating shelf. These black finished brackets are rated from 4520 pounds per pair. Also stocked in gray, white, and almond finishes. For added strength check out the extended series of concealed brackets in accessories below.