Well, everything on that list except the first item is pretty clearly just the benefits of an aspect. So, what's the price tag on "open any door"? Well, let's see. In terms of stunts, it's: use burglary skill for even magical locks, +3 to burglary for opening things, and no penalty for lacking appropriate tools; that's about three and a half to four stunts, so, as a power, I'd price that at -2 refresh, or maybe -3 if it also deals with traps on the doors it opens. It'll work best if you've already got some burglary skill, of course, but even without that it'll put you in the upper tiers of mortal ability - and remember that you can always invoke its aspect on top of that bonus if you need to.
And then there's the item of power one time bonus. That'll vary from +0 (if it's not readily apparent that the hand is a separate removable entity and/or if it's difficult for someone else to take it away from you without a hacksaw) to probably a maximum of +1 (since you can easily conceal it by just putting a glove on, or maybe taking the hand off and putting it in a pocket.)
