Norton Axe Stone Round Silicon Carbide #JB74 100mm x 40mm

This 4" round silicon carbide Crystolon stone has both a coarse side (120 grit) and a fine side (320 grit). Used for sharpening and honing paper and cloth-cutting knives and planer knives. The groove around the middle of the stone protects fingers and provides a secure hold. 100mm (4") in diameter by 40mm (1.5") thick.