Both. In some cases the rock will completely shatter allowing you to remove the entire thing. On other rocks, I was only able to break smaller pieces off…little by little. It’s great not having to worry about hitting stones with the mower any more.

I have removed about a dozen or so rocks using this tool with good results. It is nice not having to worry about remembering to dodge rocks with the mower or having exposed tripping hazards for guests. Most of the stones ranged from football to basketball size and were easy to break-up using the various chisel bits. The ones that gave me the most trouble were very large stones that were flush to the ground but I think this might have also been due to the type of stone as well. Hope it works out for you!