OX Spectrum Premium Diamond Blade - 4.5 Inch (115mm) Abrasive/GP Cutting Wheel for Concrete, Tile, and Masonry - Wet/Dry Use for Construction and DIY Projects

I used this today. And it went thorough slabs and bricks like a knife through butter maybe not so good with porcelan tiles unless you use water and get blade still. But rips through it. Used it to sharpen my chisels. I definitely buy again.