Lisle 23530 Special Hard Stone Set for 23500 Stone-Type Glaze Breaker<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>240 Grit Hard Stones</li><li>For use after re-boring only</li><li>Not for glaze breaking</li><li>Skin-packed</li><li>Shipping weight: 3 oz.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41WjhVVJjfL.jpg" noproxy>