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