Great set. I'm no tooling expert, but each key is heavy and appears to be well made. They're big enough to be easily held in your hand, but small enough to get into those hard-to-reach places. All in all a very solid and robust set. Given the price, I only wish that the instruments came in a nicer case. I didn't buy it for the occasion though, so I'm not deducting a star for that oversight. My first use was to drive a bolt into a water can. Worked like a dream.