DMT A4C 4-Inch Diamond Whetstone  For Use With Aligner - Coarse</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Legendary quality</li><li>Made in the USA</li><li>Portable pocket convenience</li><li>Coarse diamond to transform a dull edge</li><li>Sharpens knives faster than conventional stones with DMT's monocrystalline diamond surface</li><li>No oil is needed-sharpen dry or with water</li><li>Durable construction will provide years of consistent performance and reliable service</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/51wSl%2B3qyPL.jpg' noproxy></br>