Quickly and easily create an overhead storage unit in your garage, basement, shed, or wherever else desired. This 24" wide X 18" - 19" overall height (approx 17" storage height) unit can accomodate up to 12 feet of board length (Use 24" wide boards). With only eight ceiling attachment points for the entire rack of shelves, the only tools required are a drill, 3/16" drill bit, and a screwdriver (or 1-1/8" 6 point hex socket as shown in the above photo/s). The storage unit includes four 24" wide X 16" tall Shelf Hangers, eight 5/16" lag eye screws, and 8 hanger clips w/ mounting screws. Please note that shelf boards are not included. Home center stores such as Lowes and Home Depot will rip plywood shelves at minimal or no charge.