Dustar Industrial Aluminum U-Boat Platform Trucks maneuver easily in narrow aisles, confined spaces and hallways. These U-boat trucks are all-welded construction to secure strength. Truck handles are removable for oversized loads. Steel deck has anti-slip diamond plate. There are corner bumpers to prevent scuffing on walls. 4 swivel 4" polyurethane casters and 2 rigid 8" high quality DURATOUGH Hi-Tech Polyurethane on Polyolefin Wheel.