Heavy-duty all-welded 1-1/2? angle frame with 14 gauge all-welded steel construction protects your items from view and offers complete security. gate front permits easy access to contents. User friendly double hinge cover folds down and back. Padlock hasp provides extra security. Interior height of 36?. For rolling over smooth surfaces, choose the 6? x 2? polyurethane wheels. For rolling over rough surfaces, the 10? solid rubber version is the perfect choice.