Review on 🔝 Top-Notch 3-Piece SDS Plus Chisel Set: Unmatched Premium Quality by David Dreher

. The other is TE-X/Y with SDS adapter. With the SDS adapter it will also fit these drill presses (although they are a little small for such a big hammer). It's a good thing they are NOT drills because they are DEFINITELY NOT straight bars. All three are clearly not going to roll on my mill (which is absolutely right). On the tool, when I spin it, I see that the shafts are just NOT straight. In terms of hardness, they are far from the quality of Hilti bits. But it was said they shouldn't be. These are cheap disposable bits. I would say they aren't even as strong as the Campbell Hausfield brand bits I have for my air hammer. But they do a great job with Mortar and CMB. I wouldn't use it for stone work. They are too soft for my stone, which contains both iron and granite. That rock would eat those pieces alive. Of course, Mortar and SMB are much more software. I used a chisel/chisel and small flat chisels to remove the rough grout before sharpening. They are ideal for that. Use and sharpen several times, then discard.