Locking shelf support with 1/4″ peg for 1/2″ thick shelf.
Plastic shelf support with 1/4″ peg.
Locking Shelf Support With 1/4″ Peg For 5/8″ Thick Shelf
Low Profile Shelf Support With 5mm X 0.29″ Peg
Locking Shelf Support With 5mm Peg For 5/8″ Thick Shelf