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 gray finished brackets are rated from 1800 to 4520 pounds per pair and available in 4 sizes. Also stocked in black, white, and almond finishes. For added strength check out the extended series of concealed brackets in accessories below.