Copper Tube Expander Manual Expansion Tool Universal Hand Refrigeration Tools Copper Tube Change Tool Tube ExpanderEasy to use, you just need to gently press the handle to use it, releasing it will restart. Automatically pack Wide Range Universal Pipe Expander. With hinge designed, which can prevent the twist of the handle, which ensures stable operation. Convenient expansion and exact expansion result. Tube Outside Diameter: 1 4", 5 16", 3 8", 1 2", 5 8", 3 4", 7 8"(6mm, 8mm, 9mm, 10mm, 12mm, 16mm, 19mm, 22mm). Sturdy and durable. It uses the simplest structure