I think they are only meant to deter the opportunist, nut the determined,
but if its a barn then sureley you would probably not open the door, simply
drive a vehicle in through the side?
Brian

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"GB" wrote in message
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On 07/02/2019 17:42, Chris Green wrote:
I want a simple 'no key' lock for a large garage door (one piece, so
lock next to wall, not in the middle of a pair of doors). *It doesn't
have to be incredibly secure*, what I'm after is something similar to
the push button mechanical lock we have on our stable door.

Any external bolt, like the one you linked to, is extremely easy to get
through with an angle grinder.

I got though a Chubb high security mortice lock on an outward opening door
in 3 minutes with the 9" angle grinder. That Yale bolt looks like it would
take only a few seconds.