Very good chisel. too bad it didn't fly out of my hand and into the bushes, I'm still looking for it. We strongly recommend buying more than one. Be sure to purchase a chisel that is slightly smaller than the gap between the stones to avoid damaging the stones. This is the perfect size for a 1/2 inch crease pointing towards my home. We also recommend getting a triangular bag with plastic on the inside to push the grout into the seams. Looks like a piping bag to decorate a cake. My joints don't look very professional even after watching YouTube videos. Much luck! Resist the temptation to add too much water to the concrete as this will reduce strength. If you have an old house, make sure you choose the right concrete mix. If you use standard concrete, then the surface of the brick will be a beak. Concrete is meant for sacrifice and is slowly washed away in old houses to keep the brick beautiful. Search for a listed historic home in Chicago Illinois for the best advice I can find online. This is a hardened chisel for cement work, not a pointed chisel for wood. Enjoy! You get into the rhythm of the folding and it's like a working meditation. It's either that or it'll be hot and painful. Your choice, I was very pleased to get the open hinge back far enough to see the empty space. Life's little reward for a good chiseling job.