Surface quality and finish There are no sand holes or black spots on the outside of the rod; the surface is round and smooth, reducing wear on mating parts and providing comfortable handling. Uniform performance and reliability Made from quality raw materials with quality. The tension spring is tightly wound; the texture is clear. Force is evenly distributed, and the rebound is stable for consistent operation. Durability and surface integrity plasticity and good fatigue strength support long life under repeated use. Uniform stress and firmer overall construction. No surface defects such as sand holes or black spots; exquisite details and solid texture enhance reliability. Key attributes Function: springloaded rod with stable rebound and even force distribution. Material: quality raw materials. Performance: durable, fatigueresistant, and smoothsurfaced for precise operation. Use scenarios Use in precision machinery and automated equipment where smooth motion and reliable spring action are required. Use in robotic or mechanical assemblies that demand uniform stress and stable rebound to extend lifecycle. Use in DIY projects or repairs where a defect surface reduces wear and improves overall durability.