High-quality screw accessories: Select first-class hardware accessories screws, which are sturdy and durable, non-slip, more convenient and safer. Alloy steel forging: Made of high-quality alloy steel, forged and subjected to high-temperature treatment, it is safe and has a 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 and conveniently. Polyurethane rubber: special material does not damage the stone, and the texture design increases friction, making the stone less likely to slide. Suitable for lifting and handling of various stone materials!, Manufacturer: ZOCWJK