Special Purpose Tools
It's probably my umpteenth purchase from Western Bikeworks and my third or fourth park tool product. I also have the bike stand from park tools & everything I've bought here has been excellent and I highly recommend them to you plus the convenience of being able to pick it up the next day.
Solid construction with nice fit and finish as expected from Park Tool. It struck me as a frivolous purchase but in fact it's been quite useful in practice, especially when working with steel bolts, a steel bike, and mostly-steel work stand. The combination makes it possible to place the bowl on just about anything within reach, including vertical surfaces, and have it and its contents stay securely in place. Wouldn't be quite as magical for someone working mostly with aluminum and carbon fiber I imagine.
Works on octalink and square tapered cranks. Allows for unlimited leverage with a wrench or crescent wrench, with the added benefit of ergonomics of the handle. Not intuitive at first but the roller at one end comes off and goes on to the other end to convert it from splined to square tapered crank compatibility. Why buy two tools when you could just buy one? It also takes up less room.