Ways not to lock your bike

I got a Lock N” Roll seatpost QR for my bike I leave at work, had a ball bearing in it before but missed being able to change saddle height easily, works well as only releases when bike is upside down. Still got a ball bearing in the saddle clamp but use hot melt glue rather than superglue, even then takes a while to get it out with craft knife blade.

Whats that on your chain ring?