Not all wheels lock - depending on the size
I like that the width goes from 1/2" on up to 4". The central locking bolt does not lock the distance on the outer wheels, so you have to hold the outsides at the proper width with your hands. If one is going for 4", that's not a problem, but smaller widths might be a little tricky. But it doesn't cost a fortune, so there's that.
By Susan, TX on August 25, 2017