Whetstone</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Uses hardened steel plaque coated with diamonds</li><li>One tool with three functions: sharpening， strengthening and honing</li><li>Works with any brand of pruners that use steel blades</li><li>When dirty， clean by scrubbing with water and a scouring powder.</li><li>Made in Switzerland</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/31Bpr6aqwqL.jpg'></br>