I'm not an expert on SDS Plus bits or bits, nor am I a contractor who uses them extensively. All I can say is that they have worked well for me so far. I blasted a concrete block and piece of concrete from 12 years ago and there were almost no marks left on the bit. I am installing a new shower and this kit will be used to remove the existing ceramic tiles and relocate the shower drain. Based on my testing (albeit limited), I'm confident this kit will do what it takes to make this project a reality. They come as a square plastic "tube" with a top and bottom that slide into each other and are secured with tabs and indentations. I like that they are kept together and in a waterproof container that protects them from rust and dryness. Nothing special but more than enough and probably more than others. You will receive three chisels. All have thick shanks that are over Β½ inch thick. I think the pointy one is for making holes or destroying something. ΒΎ" (20mm) is good for cutting a new trench in my shower floor and 1 Β½" (40mm) is used to remove any existing ceramic tile. At least that's the plan. From what I can tell they seem pretty standard as they use 40RC steel with 10 inch shafts and SDS Plus fittings. I think they are cheap. You could easily spend that much on a chisel, here you get three, delivered to your front door in a suitcase. i am sold
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