Easy to hook on orthodontic accessories.
Offers the same shape memory benefits of superelastic Ni-Ti springs, with the added benefit of reduced inventories. 
Designed for applying the precise force required for every situation. As these springs are extended (close wound), forces are gradually increased, allowing a specific force to be generated at a given amount of extension.
Assorted sizes for easy choice and management. Just order to refill when you use out.