BOSCH HC2084 1/2 in. x 10 in. x 12 in. Bulldog SDS-Plus Rotary Hammer Bit

works great drilling through rock

I needed to drill some holes in 20+ year old concrete with my rotary hammer drill. This bit was perfect size and drilled all 16 holes like butter.

Drills through concrete with ease. Bought this for a Bosch hammer drill. Bit does not run and cuts with accuracy. Great quality from a German made bit. I'm sold on Bosch bits and own quite a bit of them. Highly recommended.

Delivered on time and as purported

Works

I manage a manufacturing company and I have workers who are like the gods of destruction. Walls are always the first victim an I needed to bolt down some heavy duty guards as I wanted to stop buying dry wall and patching up the walls... I found this drill bit for my SDS plus hammer drill and started my work.I read reviews from others, but maybe because I have such a thick drill bit, I never experienced what others experienced yet. The bit never broke midway through, nor has the drill tip changed shape or whatever else I've seen. I'm nowhere near down protecting the building but I have already drilled out nearly 50, 5-inch deep holes with this drill bit and there's barely any sign of wear and tear. At the same time though, I have a bucket of water to cool down the drill bit to prevent the heat from changing the shape and I constant check to make sure I'm drilling straight in the same direction to prevent the drill bit from bending.From my honest opinion, these drill bits for the price that they're at, they're way too good to be given bad reviews and I'm genuinely believing the people that didn't have a good experience with these either didn't properly handle the drill bit OR really actually received a faulty bit, which does seem understandable if they are making these at this price point so you have to give them some slack.

I needed to drill thru a concrete ceiling for some concrete screws. This bit on my rotary hammer drill cut thru the concrete easily. It went thru the concrete like cutting thru a bar of butter. The hole was clean and not expanding beyond the diameter of the bit as much when using a masonry bit on a regular drill.

This bit will not get lots of use here. Need to drill through some outside concrete walls for security camera cable. The previous bit simply wasn't long enough.This bit fits my DeWALT 7 Amp corded hammer drill just fine, as do other SDS bits I've tried.I will not be drilling more than a few holes, so I won't have long-term results to report. But the price here on Amazon can't be beat. Less than 1/3 of the price at big-box stores as of this writing for the exact same bit.Update October 2024: Turns out I got a great price here, but the current price, while it's since gone up, is still very good. And when I finally used the bit, it went through concrete and cinder block very well indeed, and there's clearly lots more life left on the bit.