Swivel Direct Flow™#100 Thin. The #100 tip is 40% thinner than #10 tip. Tip is round in cross-section. Direct Flow™water delivery allows water to exit near the tip, focusing water flow directly on the tip while reducing excess spray and increasing visibility. For use on light to moderate deposits. Use on low to medium power settings. Thin shank allows effective subgingival and interproximal access. Ideal for periodontal maintenance and localized periodontal defects. Ergonomic 360° Swivel handle provides the maneuverability and adaptability you want in power scaling, with a slight rolling motion of your fingertips, the old "start, stop, remove and readjust" routine is eliminated--allowing even more efficiency while power scaling handle. Black silicone handle. Color-coded handle provides at-a-glance tip identification.