Jupiter Clarinet 631 - Standard 6 ring / 17 key instrument.
- heavy-duty crow's foot for the right-hand key
- tiny ramp both sides of it which means that you can actually twist on both sections without depressing the second ring of the top joint.
- well made adjustable thumb rest.
- Setscrew clamps down on a rod that also has a ring for a neck strap – the thumb rest oriented towards the hand