Up Aqua’s 4″ maintenance tool holder fits on the edge of rimless glass aquariums, up to an 10mm or 3/8″ glass, or sump. The tool holder is able to hold scissors, sand scrapers, and other tools required to maintain your planted aquarium. It also creates a professional look to your setup. 3 holes, 2 slotted holes, and 2 hangers Dimensions: 4.25 × 1.5 × 2 in