The Northern Industrial Replacement Grinding Stone is for use with 8in. wet sharpener, Item# 334820, sold separately. 8in. grinding stone uses a wet bath to sharpen blades without overheating. Wheels (qty.): 1, Wheel Diameter (in.): 8, Wheel Thickness (in.): 1 5/8, Max. RPM: 120, Wheel Type: Grinding stone, Recommended Use: Blade sharpening
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