Extrusion chain used to Bondable to Cuspid impacted palatally on labially. The traction chain swings freely within eyelet. The 0.022" inner diameter chain can be tied to the archwire with elastic thread or tubing to provide traction in the desired direction. 3.5mm diameter (Flat)-80 gauge foil mesh base assures reliable bonding. Lower profile limits irritation, 18k gold panting hook and chain can reduce allergic reactions.