Surface smoothness: The rod exterior is round and smooth with no sand holes or black spots. This clean finish reduces friction and wear, contributing to stable, reliable movement. Uniform pitch and reliable spring action: Made from raw materials with quality. The tension spring is tight, the texture is clear, the force is evenly distributed, and the rebound is stable. This delivers predictable performance and longterm consistency. Good stretchability and durability: plasticity and good fatigue strength with uniform stress. The rod remains firm under load, from surface defects, with refined details and a robust, quality texture. 23 practical use scenarios Precision linear guides and actuators: Use in guiding systems where a smooth, defect surface minimizes wear and ensures precise, repeatable motion. Small machinery and mechanisms: Ideal for springloaded components that require consistent force distribution and reliable rebound, such as latching or retracting mechanisms. Repetitive, cycle applications: Suitable for robotics or automation devices that undergo frequent cycling, where fatigue strength and uniform stress help extend service life and maintain performance.