Hirsh Cabinet Dolly for Verticle File Cabinets
From Hirsh
Buy it for $11 INSIDE Office Depot 
Don't buy this product on line. All the on-line stores rip you off even office depot. GO INSIDE OFFICE DEPOT and purchase this EXACT dolly for a lot less or purchase the the flat cabinet dolly which is filled in and not empty on the inside of the dolly like this one is at office depot also for a 1/4 the price. ALL the on-line stores selling this product and other cabinet dollies are a COMPLETE RIP-OFF.
I purchased 2 of these awhile back ON LINE and then saw them INSIDE Office Depot for $11 each and they were not on sale. Office Depot credited my credit card for over $20 each cabinet dolly I purchased. They look cheap but my vertical cabinets are now heavy and they are holding up well. I rate it a solid 5 but wish they weren't made in Mexico as I try NOT to purchase anything from Mexico.
Note: I purchased a roll of Velcro and cut 4 small pieces to fit into the over the top edge/side/bottom corners of the Hirsh cabinet dolly to avoid scratching up my new file cabinets and it worked perfectly.
October 2009 UPDATE: I just purchased TWO Lateral Hirsh Cabinet dollies which adjusts to fit cabinets 30"-42"-wide by 18"-24"-deep and has heavy-duty casters with 2 locking. Call Hirsh to located sellers 800-383-7414. Reliable where I got mine 1-800-735-4000 Item number GM15030 and ADT American 800-523-2300 which was more expensive.
October 2009 UPDATE: Called Office Depot and the vertifical Hirsh dolly went up to twenty four dollars.
Both the Hirsh vertical AND horizontal cabinet caddies are STRONG!
