DEWALT DW4725B3 4-1/2-Inch High Performance Diamond Masonry Blade, 3-Pack
Provides faster rate of cut at constant depth with 30 times the life of bonded abrasive blades. For cutting concrete, brick, and other masonry material. Max RPM 13,300.  Edge thickness .080 inch.  Arbor size 5/8 or 7/8