This should have probably gone under "Bondage Hardware and items" but it's a poll so I thought I would add it here first and let the mods move it if necessary.
I'm really considering offering locks (luggage sized) through my site for locking the various restraints I make closed. Since they are all going to have locking buckles on them, I figure I should have locks to lock them closed. I'm looking at Master locks, sets of 6, 10 and 20, all sets keyed to ONE key, so that if you order a body harness (needing 9 locks) you don't have to fumble with a dozen keys to figure out which goes to what, it's only one key that opens all of them.
We actually bought two sets of four padlocks each so that we wouldn't have to mess with multiple keys - this way, as long as we only use the silver locks or the brass locks, only one key to mess with. If we use both, then we have to use 2 keys, but still ... better than one key for each lock.
Skeleton Keys might be best for me. I'd hate to misplace a key or thought I had the right one after I put a lock on my pet. That might cause her to have to call in sick.
if you order a body harness (needing 9 locks) you don't have to fumble with a dozen keys to figure out which goes to what, it's only one key that opens all of them.
We have a dozen specially made locks that we use. A friend of mine makes custom locks. To me that is the only way to go...I can't even imagine fumbling with 12 keys. What if there was some emergency?