Dee Zee Tool Box - Topsider provides handy storage on top of your trucks bed rail. Constructed of durable Brite-Tread aluminum. Texture Black powder coat, provides a matte black finish while it protects and prevents oxidation. Drop-down doors provide quick access to your tools. Locking stainless steel T-handle latches. C-Channel design resists leaks, incorporating a one-piece neoprene rubber bulb seal.