Positive Rake Angle for optimum cutting efficiency dislodging debris. Variable Helical Flute Angle increases debris removal. Wide Radial Land for increased peripheral strength. Radial Land Relief – minimises over engagement and reduces breakage. Third Radial Land – stabilises and keeps the instrument central. 4mm shorter handle for easier posterior access. Simplified colour coding - .04 Green, .06 Orange. Safe-Ended Tip – minimises ledging, perforation and zipping.