Dammit. The greedy version that is $400 and comes with the lock is unavailable. And the works bell version is $370 and an additional $230 just for the lock. Jesus.
It's worth the money if you want the best quality quick release and lock available. Works Bell is the only quick release I would buy. I have it in my Integra and I get absolutely no play on my steering wheel. Can't say the same thing for these other Chinese knock offs (NRG or ebay). Trust me, Works Bell is the one to get.
Because these momo flush horn buttons weren't meant to work with WB hubs or QR's so the setup needs to be modified for the horn to sit correctly. I have a youtube video on how to do this on my channel. Basically you need to grind the ring down.