Mystery key...

[RPAspey]

tongue lock

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It's a fifth wheel

[Bigmo1]

ok, whatever, hitch pin lock...looks like the key to mine

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[huntr70]

OK, to put this post to bed and end the speculation...

The Southco R001 key is used on slam latch locks THAT ARE NOT ONE KEY locks.

Your particular Reflection has the ONE KEY, which will do everything. On some of them (part's shortages) they use different slam latches and entry door locks, which will then use multiple different keys.

Realistically, you should have 2 of the keys that do everything.

[RPAspey]

OK, to put this post to bed and end the speculation...

The Southco R001 key is used on slam latch locks THAT ARE NOT ONE KEY locks.

Your particular Reflection has the ONE KEY, which will do everything. On some of them (part's shortages) they use different slam latches and entry door locks, which will then use multiple different keys.

Realistically, you should have 2 of the keys that do everything.

Thank you.

[Rabbit]

I have the same key and it fits the pass thru doors. Just saying. Same make and same number.

[RoJoSo]

This is all just a bit strange but, It all works so . . .
Ill just keep all the keys on my ring just in case the lock decides to no longer accept the key

[Rhertzy]

Is it a 751 key for the outdoor kitchen?

[cmurray]

Grey key unlocks everything. Silver key is the mystery.

My 2020 Imagine came with 3 keys. The larger one with plastic unlocks the main door latch and deadbolt.

The two smaller keys look like your mystery key with a slight difference. One silver key has cuttings on both sides like your mystery key and my other key has cuttings on only one side. My key with cuttings on both sides unlocks the storage department doors on each side. The key with cuttings on just one side unlocks the outside refrigerator door. Why that outside door key is different than the two storage compartment doors, I don't know. I'm surprised your larger key unlocks the main door and storage compartment doors.

[Dave & Vicki Lent]

Does it say CH751 on the opposite side?
If so, that's a very generac key used in most rv units for outside locking compartments.

[graine]

Grey key unlocks everything. Silver key is the mystery.

Looks like my hitch lock key. Maybe the dealer had a hitch lock on it while it was on the lot and took it off once you showed up to pick it up.