The SKB Roto Rack/Shallow Rack Caster Platform is a highly-durable caster board designed to accommodate SKBs Roto Moulded Shallow Roto Rack and Standard Racks featuring 4 locking wheels ideal for convenient transportation and stacking with other cases. The caster platform itself is constructed from polyethylene and roto-moulded for maximum strength and durability. Additionally the case features heavy duty cinch straps that will attach to the side handles for added stability.