Non-Slip Design: Polyurethane rubber material does not hurt the stone, non-slip textured design provides extra friction to prevent slipping, safe, wear-resistant, can be used for a long period of time, will not slip during operation, safety is greatly improved. Bold Nut & Ergonomic Pull RingThick rod nut fittings, safe, convenient and durable, strong stability, no breakage, no jamming, smooth operation, without any lag phenomenon; pull ring design ergonomic, exquisite casting process, high strength, toughness, lifting durable and stable. Multi Application: Used in factory hoisting, road construction, and stone transportation. can be used with crane trucks、tower cranes、overhead crane、mobile cranes，to carry out the installation of lifting concrete blocks、granite slabs、timber、plate、stone slabs and large prefabricated. High Temperature Forging: Stone lifting clamps are made of thickened alloy steel, high-temperature forging treatment, safe and durable without breaking, with excellent durability and stability, can be used in harsh environments for a long time. Adjustable Opening Width: Multiple holes can be adjusted, the size of the opening can be freely adjusted according to the size of the stone, in order to fit different sizes of stone, to meet your diversified needs, greatly improving the practicality and convenience.