手扳葫芦是通过人力手动扳动手柄借助杠杆原理获得与负载相匹配的直线牵引力，轮换地作用于机芯内负载的一个钳体，带动负载运行。它具有结构紧凑、重量轻、外形尺寸小、携带方便省力、安全可靠、使用寿命长、手扳力小、对钢丝绳磨损小等优点。它可以进行提升、牵引、下降、校准等作业。若配置特殊装置，不但可以作非直线牵引作业，且可以很方便的选择合适的操作位置，或以较小吨位的机具成倍地扩大其负载能力，对于较大吨位负载可以采用数个机具并列作业。
Hand squash is by manually pulling the handle with the aid of the lever principle to get the linear traction that matches the load, and the rotation of the load on the load in the core of a clamp body to drive the load operation. It has the advantages of compact structure, light weight, small size, convenient and convenient carrying, safe and reliable, long service life, small hand pulling force, small wear to wire rope and so on. It can carry out lifting, traction, descent, calibration and other operations. If a special device is configured, it can not only be a non linear traction operation, but also can easily select the appropriate operating position, or doubly expand its load capacity with a smaller tonnage machine. Several machines can be used in parallel operation for a large tonnage load.