we have a heavy-duty shelf with 3 pullout drawers on heavy double roller bearings. There is also a top shelf for additional storage. But it does not pull out. It works perfect for auto mechanics or heavy diesel mechanics to place large engine or Transmision parts on when doing rebuilds. Saves huge amounts of time bring parts over to a work bench. The pans on each shelf come out easily to wipe down and degrease. We used it for large injection mold dies. But we no longer have that contract so all the machines and other components are being sold off. This is the newest shelf rack we purchased and saw very little use. its almost brand new. we paid over $3000 for each unit. Great space saver for anything in heavy industrial use. machine shops etcetera...