Roll smoothly on 2 swivel, 2 rigid casters. Rugged 3/4" thick plywood deck with lacquer finish is surrounded by a sturdy 1-1/2" x 1/8" angle iron frame with chip-resistant enamel finish. Removable cross-braced tubular steel handle. Corner sockets on both ends are integrated into the frame to accommodate additional removable handle (sold separately). Easy assembly.