Model fifty-one HSZ chain hoist products, I think we should all know! Our professional sales fifty-one pairs dove chain hoists, please contact QQ2048585929 For consultation. 1, easy maintenance: Two pigeon hoists http: // www. wuyishuangge. com / steel simplifies maintenance and replacement of parts, which is double pigeon hoists great advantage. 2. Run: Two-pigeon hoists work is divided into single-speed or two-speed hoisting, hanging hook or run the car with a manual or motorized, two-way or multi-way operations. 3, overload protection: Some high-end dual dove chain hoists to add additional security to increase the overload protection device, which is for the operator, hoist and overload is a special protection. When the load is greater than the set value, overload protection automatically starts hoist lifting will stop automatically. 4, the nickel surface hardening: Nickel hardened chain after special treatment, does not affect the initial chain performance. Nickel hardened chain with superior performance, resistance to rain, water, streams and chemical substances cause corrosion.