Well i have not used it yet, but looking at it, its well made and heavy duty, very handy to have for handling large sheets of metal, a great jig to have handy with your hoist's lifting accessory's
I purchased 2 of these clamps so I could lift plates with out them swinging or swiveling under my tractor bucket. The are industrial grade products that grip well on new and old, rusty steel. They are an excellent product I would purchase again.