Csdtylh 6PCS Rock Splitting Wedges and 1PCS Rotary Hammer Drill Bit, Wedge and Feather Shims, Stone Splitter Tools for Granites, Concretes, Boulders, Volcanic Rocks, Limestone Rocks

I purchased this set for split granite boulders, and so far they have a done a great job! The bit takes very little time to drill the holes with my rotary hammer drill. It is starting to get a little worn after about 50 or more holes drilled, which is to be expected, but still doing the job. The wedges are holding up fine.

Worked perfectly for what I needed. Digging a hole for an elevator and have to do it by hand because in an old building. There was a rock too big to lift and we drilled several holes to try to break it without success. Put just three of these in when they got here and in one minute the rock was cracked in half. The drill bit works and for the cost it’s ok. I used the other bits we had so could go little deeper and faster but it does work. Very easy to use and just in the time it saved me they paid for themselves. In the photo you can see where we drilled before to try to get the rock to break. I put 3 in spaced out and you can see how much they had do themselves

Drill bit is terrible. It was dull and unable to drill into rock after the first few holes. Quality one I have are 30-40$ alone with out the feather and wedges. The wedges work great and are worth it alone for the price.

I read some reviews that these were not up to the task. They fully exceeded all my expectations. Here is how I was successful using these to break up concrete. First, be sure you drill your holes far deeper than these wedges. Use the proper diameter drill bit. For the concrete ranging from 4 inches to 6 inches thick, I did holes 4 to 5 inches apart. Assemble the three metal pieces with the heavy rubber washer. Barely engage the actual wedge. This lets you drop the assembly almost completely into the hole. I also tapped both outer sleeves down as far as they would go, just tapping them. Then, using a single-jack, start tapping in each of the wedges. You will hear it and you will feel it as they bottom out. Just keep working back-and-forth from one to the next. You will quickly see a crack forming from hole to hole. When you drive the wedges down, don’t keep bashing them. If you have reached the rubber washer, it is time to stop. It is critical that you have a gap on the away side of the piece you are breaking off. There must be some place for the waste to move into as you are driving in those wedges. I still had to pry the slabs away. In fact, I used my single-jack to break the slabs apart once they broke off. It made it easier to work them out of their nest. I did use a drop of three-in-one oil on each of the three parts. Just seems to help them not get bound. Like any tool, you must treat them as they are designed to be used, and you must not abuse them. If you try to take shortcuts and use the wrong sized hole, for example, you will definitely have problems. If you try to brute force your way into success, guaranteed you will have problems. If you bash the ever-loving snot out of these, guaranteed you will have problems. Treat them right, and you will have success.

Drill bit is worthless-I used a hammer drill and cooled with water. I drilled and drilled and only got down 1/2”, put in a used bit I had and drilled down 3” in seconds! Wedges worked fine

They worked fine; in five minutes I was an expert. The drill bit is great; i've drilled about 100 holes in rock and it's still sharp.

The wedges for fine. The drill bit, however, was good for just one hole. Then it was as dull as a bad prom date. I was careful to not let the bit overheat and I kept the hole clear of debris. But no, one hole was all she wrote.

actually used it on a boulder and it actually worked as designed.