Let's say you're working on a threaded headset. You need two cone wrenches, typically. One for the cone and one for the locknut. All fine and dandy.
That cone and that locknut are pretty close together, though, and that can make it awkward to get both wrenches in position. So we have this offset cone wrench, designed to help make room for your fingers and keep all of them happy.
Available in 36mm.