Alloy steel forgings: Made of high-grade alloy steel, processed by high-temperature forging, with high safety and long service life Adjustable opening size: The opening size is marked on the side of the product, and the opening size can be adjusted freely, which is convenient and quick Wide range of uses: This vertical plate clamp is used for vertically lifting and transporting steel plates and structures. Polyurethane rubber: special material, does not damage the stone, texture design increases friction and prevents the stone from sliding, Manufacturer: ZOCWJK