-You can apply torque to any tooth from centrals to 2nd bicuspids upper or lower. -Goodman Torquing Springs™ (GTS) crimps to any rectangular wire from .016x.022 to .019x.025. -You can deliver 125 to 150 grams of labial or lingual root torque to align roots and finish cases faster. -Use small springs for upper laterals and lower anteriors, and large spring for all other teeth. -The GTS crimping plier is specifically designed for the Goodman Torquing Springs™. -The plier beak is serrated with rounded corners which prevents the spring from slipping and accidentally being cut. -Also, the recoil spring in the handle makes it easier to crimp. **For further product information, please contact Chat Support**