Find shelf rest in either plastic or metal. Each of our shelf rest is suitable for specific brackets based on thickness, 3/16 (standard) or ¼ (heavy duty) inch. The rubber buttons create suction for glass shelves to sit more firm on top of the brackets. The same shelf rest will work on any regular shelves, just remove the rubber button and screw in a nail where the button would have been. Order the same day before 4pm PST and your order will be shipped the same day from American Retail Supply!