The tray is heavy angle iron and is capable of holding a jack. It is also a good place for the drain pans when changing fluids. The wheels allow you to move the rack around the shop or driveway empty or with a vehicle on it. If you go with a 4 post lift, get the bigger capacity lift (10,000 or 14,000 lbs) you will be happy you did.
secret

Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)