They are the cat's meow!!! I was advised against these, and that I needed a dedicated pallet fork to replace my bucket, but the clamp on have done all I have asked and more!! They do have limits, but I wouldn't trade anything for mine.. Just too dang handy.
Mine don't have the cross member for the additional support. My only critique might be that it could be heavy to move both at once. Mine weigh about 75lb ea, so I would hate to have them connected.
Doc