The JAM shelf clip is a classic shelf support that can be used with glass and wood shelf boards. This clip is perfect for small shelf boards, including corner shelves. The clip can be adjusted to accommodate various shelf sizes. Shelf Compatibility Shelf Material: Wood, Composite, or Glass Shelf Thickness: 0.2 - 0.79 in Shelf Depth: up to 7.9 in Shelf Length: up to 31.5 inFor shelves longer than 31.5 in, we recommend using at least 3 shelf supports. Shelf Board Sold Separately Specifications: Product Dimensions: 1 in L x 1.6 in D x 3 in H Product Material: Die-Cast Zinc Weight Capacity per Pair: 16 lbs 2 Shelf Supports Includes the hardware neededto mount the support Designed in Europe