22mm 24 Rotating Surface Fiber Optic Cutting Knife Replacement Tungsten Steel Blade

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