"One-off key", unknown brand

[Growster]

I have a hunch I have seen these before, but I have no idea what these are.

 

[grahamparker]

New one i have never seen before.

This last 2 years there has been an explosion in new unseen blanks especially out of China.

It certainly keeps the job interesting.

[Count Muppet]

I’d try the gatemate blank. Seems to fit many of the others. Don’t worry about the extra groove

[Mike at Vauxhall]

Bit alarming when they put,

"one off key" actually on it .

[Growster]

Just as an add-on: This was, in fact, a Hooply key, and the Gatemate blank worked as well. Other keys they found for the same lock were cut on both sides.

[grahamparker]

Hi Chris, i think that one off key changes the padlock combination allowing use of a second set of keys while disabling the master set by allowing a ball bearing to drop into the plug.

That is why it is called a One Off key you use it once then swap to the next set of keys, you can strip and repin moving the bearing/s back into the body if you know the positions of the cuts. Squire used to offer something similar for house builders.