This bed frame has wheels that lock. This is a sturdy frame that is very good for holding a firm bed. Very good choice!
Excellent support. Mattress stays firm and flat. I had a full size bed with a frame that had the support on the sides, head and foot of the bed. The center had no support and the mattress in time sunk down and I woke every day with back pain. Now I awake refreshed with a good night's sleep. The only thing I don't like about it is that the frame is a few inches bigger than a queen size mattress and there are no side barriers that hold the mattress from sliding.