United Abrasives SAIT 20060 Type 27 A24N Grade 4-1/2-Inch x 1/4-Inch x 7/8-Inch Fast Depressed Center Grinding Wheels， 25-Pack</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Aluminum Oxide Grain.  Soft Bond for fast stock removal. Ferous Metals (iron， steel， welds， etc.). Low grade stainless steel.</li><li>Virgin aluminum oxide grain assures consistent high stock removal for tough applications.</li><li>All sizes are made with uniform grain throughout no filler grain used in the backing.</li><li>All wheels internally reinforced with the highest quality fiberglass for maximum safety.</li><li>Super-Lock Hub on all 5/8-11 threaded wheels is the safest， vibration-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/61Y8DA03JZL.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>