Milwaukee Hand Trucks 40179 Convertible Truck with 8-Inch Solid Puncture Proof Tires Easily Converts from 2 wheel vertical truck to 4 wheel platform position 8-Inch puncture proof tires with steel hub never go flat 600-Pound load capacity Wheel guards protect the load from the tires Wheel gussets give truck extra strength and durability Easily Converts from 2 wheel vertical truck to 4 wheel platform position 8-Inch puncture proof tires with steel hub never go flat 600-Pound load capacity Wheel guards protect the load from the tires Wheel gussets give truck extra strength and durability