Norton Machine Knife Stone

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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 plan er knives. The groove around the middle of the stone protects fingers and provides a secure hold. 4" in diameter by 1.5" thick. Norton Item Number: JB74 Norton Part Number: 61463687570 Foley-Belsaw Item #3702991 Show more