Carbide bit Cone 303001 (Machine speed: best maximum)
Diamond Flame Red 021 with rounded tip (safe) (Machine speed: 30 000RPM)
Diamond Ball Red 031 (Machine speed: 10 000 RPM to 20 000RPM)
Diamond Micro Barrel Red 025 (Machine speed: 10 000 RPM to 20 000RPM)
Silicone (Machine speed: 5000 RPM to 15 000RPM)
