SAIT 22610 Type 27 4-1/2-Inch x 1/4-Inch x 5/8-11 13300 Max RPM Z-Tech - Z24R Zirconium Depressed Center Grinding Wheels， 10-Pack</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Z24R Zirconium. Tough zirconium grain.  High performance grinding for the toughest applications. Ferrous metals (iron， steel， welds). Stainless steel， high tensile alloys.</li><li>The highest quality zirconium grain.</li><li>All sizes made with uniform grain throughout， no filler grain used.</li><li>Super-Lock Hub on all 5/8-11 threaded arbors in the safest， bibration-free design.</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/612K9XPGD7L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/318K87430EL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/313tgWr6KtL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/91c0q-l0FqS.png' noproxy></br>