This diamond cutting wheel is designed for use with the EZ SpeedClic range of quick-change rotary tool accessories from Dremel. This 38mm diameter wheel can be used to cut through hard materials such as concrete, stone, porcelain and ceramics.
 
Quick and easy to use - no key required
Extremely durable - does not break and retains shape
Shank diameter 3.2mm
Working diameter 38mm
Maximum working depth 11mm
Maximum speed 20,000rpm
Manufacturer's part 2615S545JB