Hinge design can avoid swing of handle ensuring stable operation. Ergonomic engineering designed handle with coarse surface comfortable to hold and anti-slip. Manual Tube Expander is taking swaging to the nex t level. With its small, compact design, it can fit in the smallest of spaces. This proprietary design can reduce on-the-job fatigue with its easy setup and one-handed operation made possible by an innovative return spring mechanism. The size is about 155 x 153mm/6.1 x 6inch, universal to most air conditioning refrigeration maintenance use It is widely used in the maintenance of refrigerators air conditioners freezers and other refrigeration equipments. Made of alloy materials solid and sturdy durable and long life to use. Convenient and light Spring design make it work more effort.