Product Dimension -- Shelf Pin Diameter: 6.9mm / 1/4"; Max. Thickness of Clamping: 20mm / 0.79". Note: The mounting hole diameter should be equal to or smaller than pin diameter 6.9mm. Value Package Set -- Package comes with 20 pieces of clear plastic shelf pegs, sufficient quantity for you to meet your installation needs. Premium Material -- The locking shelf pins are made of high-quality PC plastic which is not easy to break or deform, durable and sturdy. It has a strong grip and strong load capacity. Widely Application -- The cabinet shelf clips are easy to install without screws. For indoor use, widely used to fix firmly the shelf on closets, wardrobes, bookcases, kitchen cabinets, show cases and other furnitures. - Material: Plastic - Pin Diameter: 6.9mm/0.27" - Fit Shelf Thickness: 20mm/0.79" - Size (L x W x H): 57mm x 17.5 mm x 20mm/2.24" x 0.69" x 0.79" - Color: Clear Package Included20pcs x Shelf Support Pegs