I will let the other reviewers tell about it's power. The chuck will not hold a drill bit no matter how hard you tighten it. It will slip and leave the bit stuck in whatever you are drilling. Every time. It's like B&D took an old key chuck and put plastic grips on it. I would rather have a key chuck. It will hold onto hex drivers if they're bottomed out in the chuck. If they're not bottomed out, they will slip once you put pressure on it. And like another reviewer noted, the chuck gets stuck and you just about have to use Channel locks to get a hex nut driver out after using it. If you use this as either a drill or a driver it may make you very angry.