| Lexington Abrasive Belts (Lexington, NC)
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| Lippert Abrasives (Reynoldsburg, OH)
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| Los Angeles Diamond Tool Inc (Santa Fe Springs, CA)
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| M C Carbide Tool Co (Plymouth, MI)
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| Marathon Abrasive Co Inc (Chester, SC)
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| Marquis Diamond Products (Painesville, OH)
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| Marvel Abrasive Products Inc (Chicago, IL)
Manufacturer
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| Master Die & Engineering (Grand Rapids, MI)
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| Mc Kinney's Sanding Belt Co (Hickory, NC)
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| Meister Abrasives Usa Inc (North Kingstown, RI)
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| Mercer Tool Corp (Deer Park, NY)
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| Metalworking Products Co (York, PA)
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| Micro Abrasives Corp (Westfield, MA)
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| Mipox International Corp (Hayward, CA)
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| Modern Abrasive Corp (Spring Grove, IL)
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| Mosher Co (Chicopee, MA)
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| Mt Pulaski Products Inc (Mount Pulaski, IL)
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| National Grinding Wheel & Supl (Harvey, IL)
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| Nevada Slag Inc (MC Gill, NV)
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| New Jersey Pulverizing Co (Syosset, NY)
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| Niagara Abrasives Co Inc (Niagara Falls, NY)
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| Northwest Super Abrasive (Eugene, OR)
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| Norton Co (Canton, OH)
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| Norton Co (Duluth, GA)
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| Olean Finishing Machine Co (Olean, NY)
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