Review on Experience the Finest Sculpting Mastery with Jack Richeson's 8-Piece Coarse Riffler Set by Karla Richter

With a product that advertises that it can be used on stone, I can only assume that it was intended for painting pictures on stone. I work with marble, which is a rather soft stone, and they didn't make any impression on the marble at all. What they REALLY did was leave a very dark residue where the tips had worn away from the stone. If you're working with marble or anything higher on the MOHS scale, they're utterly useless. In fact absolutely no merit unless you are looking for a set of cheese graters. And the star I gave her? This is a negative star.