Steel Horizontal Plate Lifting Clamp: Pull out the safety plug before use, adjust the chain to a proper position, and then plug the safety plug back Vertical Plate Clamp: The size of the opening is marked on the side of the product. The size of the opening can be adjusted freely and conveniently Spring Device: Our plate lifting clamp has spring device for tight locking which may ensure plates from slipping resilient and Stable: Made of premium low-carbon alloy steel with plastic spraying, this plate clamp is resilient and stable