4.5" x .250, Extended Performance Tuck Point Blade, 5/8"- 7/8" Arbor, Extended Performance Diamond Matrix Provides 350 Times The Life Of Conventional Abrasives, Segmented Rim Blades Are Laser Welded With Heat Treated Steel Bodies, Large Diamond Segments With Cobalt Is Ideal For Use Across Various Product Applications, For Cutting Brick, Block & Tile.