Product Introduction：

   　- It consists of main parts, sling, capstan, and protection chains.

　　- Be made of durable super light aluminum alloy, adjustable legs, safety factor more than 10.

　　- Automatic lock capstan for rising and falling, to protect sling work.

　　- The cable of sling is made of stainless steel, good tenacity and rust proof.

　　- Convenient combination is suitable to fix at the well and pit mouth. Out of the limit of the ground unevenness.