They work well. And you'll have a spare key!These aren't that expensive, not sure if they are all keyed alike, if so then anyone who has one will be able to undo. Might just make my own, shouldn't be difficult and will be one off so no chance of anyone having a key. We will see, shouldn't be too much of an issue around here but you never know, might be some Canadians on holiday or something.
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