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This unique chain saw accessory grinds a razor sharp edge on any size chain using specially designed grinding wheels All you supply is a 14 portable electric drill for best results use 2 R or The Benchmark sharpener assures the correct grinding angle and a built in gauge maintains the proper height It produces a ground edge much sharper than a Med edge Replacement grinding wheels are available in and sizes Touch Foam Instant Insulation This product has passed the Federal Hazardous Sub stances Labelling Act en forced by the Food Drug administration Touch N Foam Is not a hazardous material as defined by the Department of Transporta tion It has passed both open and closed drum flame tests It is impervious to freeze thaw tests has a density of 1 12 pounds per cubic foot At an approximately 70 tempera ture it has a year shelf life It dries tack free at 70 in 20 minutes and has a tack- free time at 35 of hours At 70 It cures in six hours and at 35 F it cures in 24 hours Its nontoxic properties make this an insulating pro duct where it is possible with none other