Dremel 537 Brass Brush - End Shape<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Use on gold， copper， brass &amp; other precious metals</li><li>Brass is a softer material than steel， and they are non-sparking</li><li>Do not run in excess of 15，000 RPM</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Q5%2BDka7-L.jpg" noproxy>