Boltless design lets you easily configure shelving into a five-shelf unit or a three-shelf/two-shelf worktable. Industrial-grade particle board shelves with steel frame. Each shelf holds up to 1,000 lbs., adjusts in 1 1/2" increments. Number of Shelves: 5; Shelf Capacity (Weight): 1,000 lbs; Material(s): Steel; Color(s): Sand.