Foss sharpening stone: Excellent natural stone quality of Hard Silicon Carbide provides a clean crisp edge on harder metal blades. Dual-sided stone has a rough side for sharpening and a smooth side for polishing. Suitable for professional or recreational skaters seeking excellent sharpening results. Use with Water, Oil, or Dry. Great for Harder metal and PM blade runners.

SIZE: 25x7.5x2.5cm (10x3x1 inches)

Grits: Fine side: 320 Coarse side : 150