The burs cut like butter...even after the first use!Joseph Lichter, DDS Brooklyn, NY''A quality diamond that has the speed and durabilityto compete with any diamond on the market.''Andrew Deak, MD, DMD Elyria, OHBuilding on decades of experience, Spring Health Products manufactures diamond burs that are designed to improve cutting efficiency and reduce chair time.Fiber Optic Push Button Swivel High Speed HandpiecesSPRING 705-HIGHSPEED more... See more text