Heavy and well made. They work wonderfully as the doors to my home office. The only two gotchas  (1) The top strap holes are predrilled, and werent compatible with my track hardware.  I had to drill my own holes. (2) These shipped to me on a pallet, so I had to find a means to dispose of the pallet.  Oh, and Ill just mention, there is a slot on the bottom and the doors come with a guide for the slots.