Buyers Products' Aluminum Barn Door Toolboxes have a barn door underbody made of smooth diamond tread aluminum. The toolboxes feature a full perimeter D-bulb seal protecting against leaks. The underbody boxes that are 18, 24 and 30" wide have a single, left-swing door with a single point latch. Models that are 36" or wider have double barn doors and feature full access openings with no center post. A locking three-point, T-handle compression latch with low-friction roller also provides secure storage. With TIG welded corners for optimum finish, the underbody toolboxes come 0.100" thick, polished diamond tread aluminum or 0.125" thick aluminum.