Alloy steel forging: Made of high-quality alloy steel, forged at high temperature, high safety and long service life Polyurethane rubber: rubber non-slip chuck, polyurethane rubber material does not hurt the stone, and the texture design can prevent slipping and increase safety Convenient: The lifting clamp is equipped with a special swivel hook device, which makes it easy to put the clamp in a vertical position. Adjustable opening size: The opening size can be freely adjusted for easy use. Please check the product description for detailed size. Lifting Clamp: This vertical plate clamp is used to lift and transport steel plates and structures vertically., Manufacturer: ZOCWJK