Universal Drill Stoppers Silicon Jull-Dent 042 These are universal Drill Stoppers compatible with any implant system drill in the world. Put 2-3 Silicon Drill Stoppers on each drill for 100% Stable result. Diameter: 1) Inner 1mm, Outer 5mm. (For Drills of Diameter 1.5 to 3mm) 2) Inner 2.5mm, Outer 6.5mm (For Drills of Diameter 3.2mm and more) Material: Silicon (Autoclavable, Life Time Warranty) Package contains: 10 Pcs of Silicon Stopper