Anti Bad person theft protection for your irreplaceable and invaluable cue.
This not only can avoid honest mix-ups at the club, but also aids considerably in the more serious theft/proof of ownership issues that can arise, unfortunately.
These rubbers are printed in TPU and consist of 3 parts

For when you show up to wherever the unsavory individual has offloaded the cue and now a digital identification is required to prove that it is yours.

Just scan the NFC chip inside the rubber with your (or their) phone, where I will digitally transcribe your info/proof of ownership.
This can be linked to your identity in any digital medium and will therefore be undeniable and instant should an issue arise.