manganese steel material. It is smoother and less likely to get stuck in the slot. The housing material of the aluminum alloy chain wrench is made of aluminum alloy, which can well protect the components of the wrench from damage. Its models include 0.5 tons, 0.75 tons, 1.5 tons, three tons, six tons, nine tons, etc. Because its price is higher than that of alloy steel wrenches, but due to its lighter weight, it is suitable for high-altitude operations. Therefore, it is suitable for use in high-altitude power line tensioning.