Timber Tuff gives you the ideal way to sharpen your chainsaw chains with the Timber Tuff 1/8 in. Grinding Wheel CS-BWM018. This grinding wheel replaces the wheel in your Timber Tuff CS-BWM to keep your chains sharp and accurate. This chainsaw sharpener grinding wheel boasts long-lasting, heavy-duty construction designed to give you an excellent cutting edge on your chains.12 months limited parts warranty