Ultrasonic inserts remove even the most tenacious debris, but they can be delicate. The stack should be straight for optimal vibration, and tips need to keep their original shape for superior effectiveness. Get protection for your inserts and peace of mind that your inserts will function optimally each and every time with the new Hu-Friedy Ultrasonic Kit featuring Swivel Direct Flow™Inserts. FEATURES: Superior Protection from weight of other instruments during cleaning and care process Extended Insert Lifespan from minimized potential damage to insert tip and stack Safer Protocol as less handling of insert reduces chances for sharps injuries Professional Appearance on procedural tray Color-coded for at-a-glance identification Includes: (1) UI30SDSET (After Five™ Swivel Direct Flow™ Inserts, Set of Three) - UI30SDL (After Five™ Swivel Direct Flow™ Inserts, Left) - UI30SDR (After Five™ Swivel Direct Flow™ Inserts, Right) - UI30SDS (After Five™ Swivel Direct Flow™ Inserts, Straight) (1) IM60H8 (Signature Series™ Ultrasonic Insert/Handpiece Cassette, Large)