[Features] ● The spring is made of stainless steel that does not easily rust even when water gets caught in it, and does not cause winding failures. ●The elastic resin protects the entire conveyor, so even if it is dropped, it will not damage the building materials. ●Claws are quenched to resist bending. ●The tape is hyper-coated to prevent blurring of printing and to keep clear graduations for a long time.