Q. Where can I get a KCT-11BB keychain with integrated ball bearings?
A. Only from this website. Most ebay listings are cloned versions of the older non-bearing design, some of which require a drinking straw to operate which is just silly. With a certified KCT-11BB you will receive a compressor specification card. If it did not ship from Tucson, Arizona, USA, it's probably a knockoff.