Powerful functionality The 6/10/12 mm hand tube smoother is designed to quickly and effectively straighten bent or coiled tubes in brake and fuel systems, so you can shape and measure your lines easily and with confidence. User-friendly grip A comfortable handle makes this tool easy to maneuver in tight spaces. Simply insert the tube and slide it back and forth for smooth, precise straightening. Construction Made from sturdy metal, this tube smoother resists rust and oxidation, ensuring durability through repeated use. High compatibility Works seamlessly with steel, stainless steel, copper, and aluminum tubes in 6, 10, or 12 mm sizes, making it a versatile addition to your toolset. 2-3 use scenarios - Automotive brake line repair or retrofit projects where precise straightening is needed before bending. - Fuel line installation or modification on cars or motorcycles, helping lines align cleanly. - General tubing work in tight engine bays or panels where a compact tool aids quick straightening of bent lines.