Like the animal it's named after, you don't want to smell the SkunkLock. It has a lock that contains sealed chambers filled with a proprietary noxious gas mix. The gas is released only when the seal is punctured by an angle grinder, the most common tool used by thieves. As well as make a would-be thief vomit, the SkunkLock gas is designed to ruin any clothing it comes into contact with. The lock will also be usable on motorbikes and mopeds.
http://skunklock.com And check this link for some safety tips
https://www.foldingbikezone.com/bike-safety-tips