DIABLO 4-1/2 in. x 1/4 in. x 7/8 in. Masonry Grinding Disc with Type 27 Depressed Center DBD045250701C - The Home Depot
Source Automatic Desktop Electric Mortar Grinder with Agate Mini Grinder Grinding Disc 125mm Mortar and Pestle for Lab Research 0-10rpm on m.alibaba.com
Whirlwind USA 4.5 in. Segmented Diamond Grinding Turbo Cup Wheel for Concrete and Mortar GPST 4.5 - The Home Depot
Steel Grinding Disc Sander Disc Sponge Plate Hard wipe Plate for Electric Cement Mortar Trowel Wall Smoothing Machine Accessory - AliExpress
Diamond Cup Grinding Wheel 7-inch for Concrete and Mortar – INStock Tools Supply
4 inch Diamond Grinding Cup Wheel Concrete Mortar Granite Marble Stone Masonry for Angle Grinder Turbo Segmented Arbor Reducer Washer Included - Amazon.com