- Premium material: made from a zinc-iron alloy, the tool is sturdy and robust, providing durability and long life. - Shuttle-joint design: the handle features a rough-textured grip and a shuttle-joint design to reduce effort, offer a comfortable hold, and prevent slipping. a simple yet effective tool for HVAC maintenance and repair. - Stable operation: designed to expand copper tubes with an outer diameter of 4-22 mm. the swivel handle ensures stable operation during use. - Double-ended design: significantly reduces size and space, easy to store in a pouch or at the work site. convenient in tight spaces and suitable for one-handed operation, increasing ease and flexibility. - Use scenarios: - HVAC installation or retrofit: expands 4-22 mm copper tubes for refrigerant line assemblies. - On-site service in tight spaces: compact dual-end design allows use in cabinets, engine bays, or other confined areas. - Maintenance and repair: enables quick tubing adjustments during routine air conditioning system servicing.