Power tools are like books in one important way — they can't always be judged by their covers. For instance, a pair of drills sitting side-by-side in a glass case at the hardware store appear to be exactly the same. But closer examination reveals that one is priced at $25, while the other is priced at $100. The difference is that the expensive drill is the "professional" model and the other is the so-called "consumer" model: a distinction that runs deeper than the name and price. Professional tools are designed to be more powerful, last longer, and perform better under stress than their consumer counterparts. They are built for carpenters, plumbers, electricians — anyone who uses a power tool every day
