Review on 545 Diamond Cutting Wheel Set (22mm) - 25pcs with 402 Mandrel (3mm) - 5pcs and Screwdriver: Ideal for Rotary Tools by Kristopher Rodriguez

I want to thank the white witch who makes this. I am restoring a 115 year old tile floor. The tiles have a 1 inch hex and have been set into the concrete one at a time. They are almost impossible to pull out without collateral damage to all the surrounding tiles. Using a "mortar remover" on a dremel is useless. These things cut through tile, mortar, mortar, cement, concrete, steel, Superman's cape, Trump's delusional ego, and the average banker's heart with no problem! They are magical and I can't believe otherwise. A PLUS. They're 25 in a pack for $10. The Dremel blades I used are $20 each and took about an hour of work. These little blades will hold up cutting for several hours before needing to be replaced.