Prime-Line Products U 10181 Self-Locking Shelf Support Pegs (4 Pack), Clear Used to support and lock in 5/8 in. Thick Shelving 1/4 in. outside diameter serrated peg x 5/16 in. depth x 1/2 in. reach with lock tab for 5/8 in. thick shelves Clear finished material (pack of 4) Plastic construction Be sure to measure diameter of peg hole and thickness of shelf carefully before ordering.