i?m not sure what the other reviewers meant when they said the arm doesn?t ?lock? into place. Looks and feels sturdy enough to whether light off-roading despite not being made for this application. On the new G9700 it is very simple "min -" and "max +" that I can clearly discern in a dark room from the light of the television. Had compliments on them too. I have a wider, flat foot and these help me get through my shifts. If you are looking to buy something to just pass the regulations, this is the cheapest and best option. She is 5ft6in and size uk 10/12, so we ordered a medium. I have been on an organizing kick since quarantine. I think it feels great and supportive and these are super soft and warm! 5 mm jack and place it to an acceptable range.