Premium Materials:It is made of premium alloy steel materials with high-temperature quenching and spraying processes, which are sturdy, not easy to deform, and have a long service life. Safe Guard:It is equipped with a spring locking device, which can lock the steel plate in time to ensure that it does not slip off to greatly improving safety. It is equipped with a pre-tensioning mechanism to ensure that the clamp does not slip during lifting and unloading. In addition, the locking lever is designed to open and lock the jaws as well as to adjust the opening width for different thicknesses of metal sheet. High Load-bearing Capacity: Its high-class alloy steel material and stable structure provide strong stability with a maximum load capacity of 4409.25 lbs. You can use it to transport heavy steel plateswith confidence. Thoughtful Design: The gears of this product are made of high-temperature treatment, which is capable of clamping steel plates, is not easy to slip, greatly improving strength and durability, and is safer to use. The hook is made of thickened alloy steel, which is strong and does not break., Manufacturer: SOYWIM