The Chris King 30m BB Injector Tool is made for maintenance of Chris King bottom brackets only. The durable, all-aluminum tool is designed to be used in conjunction with many popular push-type grease gun systems by threading directly onto the gun nozzle. Chris King also provides a zerk fitting...
Strengths: Makes putting grease into your CK bottom bracket a 10 minute job (including crank removal).
$50 for a tool that only does one BB sounds expensive but if you own a CK bottom bracket this tool is an absolute god-send. Rather than prying off the metal clip then carefully (so you don't tear it) removing the rubber seal, spending time trying to get grease into the bearings and then re-assembling everything you just hook this sucker up to a grease gun, push it into the BB and depress the grease gun lever and watch the old grease get purged and the new grease injected.
It takes a minute to do and keeps those precision bearings spinning smoothly...honestly, it's freaking awesome !!!