You rarely buy a tool and it far exceeds your expectations. These spring chisels REALLY WORK. I needed to break an 8 inch concrete slab and initially had no idea how to go about it. (Jackhammer? Concrete saw? Really big sledgehammer?) If you draw a line in stone with a chisel, then drill a series of holes in concrete with a drill bit along that line, and then slowly hammer those spade bits into the holes, you can thick concrete split very easily. I watched a few videos on the U-Tube channel and was very skeptical at first, but I've found that this technique actually works quite well. First, my concrete slab had no rebar or steel mesh, that would have changed the game a bit.