Features and Benefits:?IMPROVED DESIGN - Will fit ANY combination of 4 GoJaks (R & L, Any Model)?UPGRADED CASTERS - Rolls easily to work area with upgraded 1/2"-13 TPM Casters?EFFICIENT PROCESS - Improved laser cut tabs allow load and unloads in seconds. No struggle?UNMATCHED DURABILITY - Robotically welded frame guaranteed for life.?AMERICAN MADE - Designed, Tested, Manufactured, and Proven in the USA since 1984Notice: Rack only; this rack does not contain GoJack dollies.