41/2 in. x 5/8 in. 50Grit Grinder/Sander Conversion Kit
The Diablo kit is rated for a maximum of 13,280 RPM so there was no issue with using it on the 12,000 RPM grinder. The spindle size (5/8) was a perfect match. See your grinder manual for the best way to install the Diablo conversion kit onto your grinder; apparently some makes/models of grinders have quick attach adapters or some other such features which make the installation