Prime-Line Products U 9398 Locking Shelf Pegs, 1/4 in. Peg, For Use With 3/4 in. Shelves, Plastic, Clear (Pack of 6) Used to support and lock in 3/4 in. thick shelving 1/4 in. outside diameter serrated peg x 5/16 in. depth x 1/2 in. reach with lock tab for 3/4 in. thick shelves Clear finished material Plastic construction