Fiber Optic Cutting Knife Replacement Tungsten Steel Blade, 20mm 12 Rotating Surface, 20mm 16 Rotating Surface, 20mm 24 Rotating Surface, 22mm 16 Rotating Surface, 22mm 24 Rotating Surface, 22mm 16 Rotating Surface With Hole

1. Material: tungsten steel
2. Number of rotating surfaces:12/16/24
3. Service life: about 50000 times
4. Cutting angle: less than 0.5 degree or so
5. Flat surface, no bump, smooth cutting
6. Sharpness of blade is more durable, long service life
7. Diameter: 20mm/22mm
8. Weight: 20mm about 10g; 22mm about 13g

Note: delivery only the cutting blade, does not include other items in the picture