I despise the big bulky handle Kryptonite (and all the rest) put on the keys for their bike locks. It means it won't fit nicely in key wallets/holders, for example. I'd like to rip off that plastic and replace it with something designed to be approximately the same size and shape (and, crucially, thickness) as a standard key. The kryptonite keys are already thicker than a normal key, so it will be important to avoid adding to that thickness, while still being very secure and (semi) permanently attached. I imagine it would only be printed in a strong metal like steel. I have keys both with their plastic handle on, and with it ripped off, and I believe I have access to calipers, so I can maybe provide good measurements. Or, I'll just send you a key to play with.