Durable materials: The stone lifting clamp is made of thickened alloy stainless steel forged at high temperature, which is safe, durable, and not easy to break, ensuring a long service life for the stone lifting tool. Safety features: The granite lifting clamps are equipped with safety plugs for easy chain length adjustment – simply pull out to adjust and reinsert to secure. Vertical stone clamps feature silver anti-slip rings for double safety. Heavy-duty lifting clamps utilize rubber hoses to increase friction and absorb vibration, thus protecting the stone surface during lifting. Heavy-duty: The lifting clamps use thickened nuts, which improves safety and comfort; the alloy steel stone lifting clamps have high stability and durability; the lifting chain of the clamps is made of manganese steel, which can withstand high impact force and has high strength, high toughness and high stability, ensuring lifting safety. Applications and Installation: This lifting device is designed for vertically lifting and transporting materials such as marble, granite, concrete slabs, bricks, timber, and paving stones. The granite lifting device is fully assembled and requires no additional installation. The chain can be easily attached to excavators or other machinery.