They are very handy. I have one for the saddlebag lock and one for the glove box that I also pull and use for the gas lid. I used a Dremmel to cut the keys the right length (glove box key is shorter) and then to cut a slot in the knob for the key to fit tightly. Filled that whole part of the knob with epoxy. Let it cure completely and it is solid as a rock.

https://m.youtube.com/watch?v=CUJ48PtQgik