Surface finish: The outer surface is round and smooth, with no sand holes or black spots. This provides a clean appearance and reduces wear on mating parts. Uniform pitch and spring performance: Made from quality raw materials with quality. The tension spring is tight, the texture is clear, the force is evenly distributed, and the rebound is stable for reliable, predictable operation. stretchability and durability: plasticity with good fatigue strength and uniform stress. More firm construction with no surface defects, exquisite texture, and good overall feel for longlasting performance. Use scenarios and applications In precision assemblies and guiding components where a smooth rod surface minimizes friction and ensures consistent movement. In devices that require a reliable spring or force distribution, benefiting from stable rebound and durable spring performance. In DIY projects or workshops that demand a quality, flexible rod with uniform load handling and durable surface integrity.