N/A Rugged and Dependable — General Devices Equipment Shelves are constructed with a steel base, angular rollers for increased stability, and a removable plywood deck. One-way travel Battery Trays offer the user the ability to move and extend equipment or batteries and heavy loads approximately 3/4 out of one side. Equipment Shelves feature a lock-in/lock-out release handle and are a great choice for mobile installations such as, Recreational and Bus Transport Vehicles, Utility and Service Work Truck and Equipment Vehicles, and Fire/Emergency Vehicles.