Builtin spring for easier operation: the integrated spring reduces hand effort and speeds up each cycle, letting you expand pipe or tubing with consistent force and less user fatigue. Wide diameter compatibility: supports pipe and tubing diameters from 5 mm to 22 mm, so one tool covers a broad range of and installation tasks without swapping tools. Doublehead design for fast changes and tight access: the dualhead configuration lets you switch heads quickly and reach confined or awkward areas without disassembling surrounding components. Reliable expansion performance: engineered to maximize hole and tube expansion efficiency so fittings seat properly and joints are prepared uniformly for brazing, soldering, or assembly. Compact and practical for multiple projects: the combination of spring , broad size range, and quickchange heads makes this expander a convenient choice for onsite repairs and workshop use. Common applications HVAC and refrigeration: expand copper tubing to prepare joints for brazing or to fit fittings during installation and maintenance. Plumbing and general pipe : widen pipe ends for slipfit connections or to accommodate fittings on water and heating lines. Automotive and workshop tasks: expand smalldiameter brake, fuel, or hydraulic lines where precise, repeatable expansion is required. What this means for you Save time by using one tool across 5–22 mm sizes instead of multiple specialty tools. Reduce hand fatigue and speed up repetitive expansion tasks thanks to the spring. Access tight spaces and complete jobs faster with the quickchange double head. Note: retains the original functions and specifications—builtin spring, 5–22 mm diameter compatibility, and doublehead quickchange design.