Hot Max 26045 2 1/2 by 1/4-Inch Mounted Grinding Wheel， 1/4-Inch Round Shaft<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>2 1/2-Inch diameter</li><li>Thickness of 1/4-Inch</li><li>1/4-Inch round shaft</li><li>Max RPM : 3，455</li></ul></div><img src="http://ecx.images-amazon.com/images/I/516xt2CRE9L.jpg" noproxy>