Well for starters this thing is pretty damn powerful. As if it might forcefully break your wrist, the torque is insane. The Rock Impact Bit glides through thick cement/concrete like a knife through butter. A couple of issues I have is the chick not being stressed enough or being stressed and staying in place. I have often found the cartridge to come loose and the bit to fall out or get stuck. For a $180 drill or whatever it costs, it shouldn't have that problem. Everyone is like this, I had 4โฆ