I plugged it in and powered it on. I briefly went over a warehouse concrete floor with it for a minute or two. I did not test/use it further. Pad driver measures about 19 in diameter. They measure from 17″ to 20″ in diameter. Please see pictures to review condition. Comes as you see with what you see pictured. If you need more time, let me know. The item “Nobles by Tennant Co. Speedshine 2000HD Floor Buffer / Cleaner with Extra Pads” is in sale since Saturday, April 16, 2016. This item is in the category “Business & Industrial\MRO & Industrial Supply\Cleaning Equipment & Supplies\Buffers & Burnishers\Electric Cord Buffers”. The seller is “hawk_tree” and is located in Hillsboro, Oregon. This item can’t be shipped, the buyer must pick up the item.