I used this tool to break up concrete from around broken fence posts. It worked so much better than a hammer and chisel. I do wish they could have used a mechanical lock for the bit. This has a quick disconnect like on a pneumatic hose and I think the vibration often caused the bit to fall out when I lifted the tool. Also, if Amazon suggests buying demolition hammer oil with this tool, don’t buy it. You don’t need it and the suggested oil was from a vendor who does not take returns.