Check the listing for details. Diamond burrs 30 piece sets medium grit diamond coated 2 sets per winner. Condition: New. Listed at 15.48 USD. <img src="https://ti2.auctiva.com/web/aswCredit.gif" border="0"><br><a href="https://pages.ebay.com/seller-center/listing/listing-advanced-sellers/third-party-listing-tools.html#m22_tb_a2__13" target="_blank"><img src="https://ti2.auctiva.com/images/sc1line2.gif" border="0"></a> 30 piece diamond burr sets with each winner receiving 2 sets.Diamond grit medium size in a plastic case for easy storage with shaft size at 1/8 inch,for use in a rotary tool Dremel style grinder/carving/polishing tool,the most popular size for both hobbyists and professionals,and approximately 2 inches in length with a variety of head shapes for most applications.