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I'm trying to mount a geocache on a string inside a pole that looks like this:
Can you suggest me an idea how to attach the string to the pole without drilling anything to the pole?
The dimensions are:
Also, what can I do to secure it from falling down (the pole is hollow)?
What's the width of the hole? I'm thinking of a mounting system like a wall socket. Spread it aginst the inner surface. Then tie the cach on it.
Or the very low cost variant: Just use a piece of wire and bend it accordingly
A hook/eyelet toggle bolt could work, depending on the weight of the cache:
If you unscrew the toggles and reverse them, the hook would be on the inside holding the string, and you would reach in with two fingers and squeeze the toggles to extract the cache. Much cheaper than a climbing cam, but the same idea!
I think what I would use would be a Rubber Washer:
If you got a ~45mm rubber washer, you could tie your string to the washer, then put it into the hole one of two ways: either shove the washer in as deep as you can just to hold the string in place, or you could put your cache in first, then "plug" the hole with the washer. You could recess it completely in the hole so nothing is hanging out, it's black, so it won't draw a lot of attention from passers-by who may glance up into the dark hole in the pole, and the hole in the middle will make it easy for some one to stick their finger in it and pull it out.
It already has a hole in it, what if you used a cam? Not exactly the cheapest method but potentially the easiest.
Edit: if you found the perfect size Tricam that might be a less expensive option
