U-Orthodontics-NiTi-Closed-Spring-with-Eyelets-provides-consistent-force-during-orthodontic-treatments-and-remains-active-until-space-is-closed-Niti-Closed-coil-springs-With-eyelets-deliver-ideal-forces-for-Class-II-intra-arch-maxillary-retraction-as-well-as-other-space-closure-and-maintenance-applications.-Eyelet-design-allows-versatile-placement-alternatives.