1. Maxillary Sinus Autografting is secure only by 
Drilling.
2. Improves bone density from D4 to D2 which is weak 
due to drilling.
3. Excellent Ridge expansion effect only by drilling.
4. Improves bone density from D4 to D2 which is weak 
bone density by drilling.
5. Safe surgical operation is possible due to the 
clockwise drilling like the normal drill.
6. Easier and safer operation using the stoppers.