Most garages fill up with tools the same way attics fill up with boxes. You hang onto stuff because it seemed worth keeping at the time. If your dad was the type to buy quality once and hold onto it, there's a real chance some of what's sitting on his shelves is actually a piece of history. These aren't just fun finds for collectors. Each one changed how power tools were built, wired, or sold to contractors and homeowners. A few of them still work today, as long as you know what to check before you plug them in.