Pre-form (PET) Geocaching tube combination lock
If you think finding is just too easy, than how about you put a lock on it?
Make your Pre-form caches a little more difficult with the ingenious key free combination lock.
Simply set the combination and lock around the neck of your Pre-form cache to prevent opening.
Can be set with your own 3 figure combination so it’s perfect for any type of cache but would certainly make the prefect puzzle cache…