Positive: The pins seem a bit more solid than on some other devices in this price range - the metal used seems to be cast a little better. They also look a little better than other similarly priced sets that have one-piece handles and heads. Disadvantages: Individual heads have little play, so there is a certain sloppiness in operation and also when replacing them. head units. The heads are a bit of a hassle to swap out - this would be useful especially if you don't need to change heads often. Finally, there's no easy way to store unused heads - they just disappear at the bottom of the toolbox.