Not that you or anyone asked, but when I see erroneous information posted regarding California's knife laws I feel compelled to post.
It is illegal to carry concealed ANY fixed-blade of ANY size in California. There is no exception in that law for fixed-blades with blades under 2". Here is how the California penal code defines fixed-blades, there is no mention of blade length-
http://leginfo.legislature.ca.gov/f...ctionNum=16470.&highlight=true&keyword=dagger
And here is the law regarding the concealed carry of fixed-blades, again, no mention of size-
http://leginfo.legislature.ca.gov/f...ctionNum=21310.&highlight=true&keyword=dagger
Likewise, possession of "knuckle knives" is also completely illegal in California. Whether or not a knife is considered a knuckle knife in California will be determined by the cop on the street, the prosecutor, the judge, the jury, and perhaps the appeals judges.
If a cop considers a knife to be a knuckle knife, they can arrest you. If a the prosecutor believes that the knife is designed to be gripped with ones fingers passing through a metal ring (but not exclusively metal), or, that it is merely possible to grip the knife in such a manner, then they can and will charge it as a knuckle knife.
If a person carrying such a knife explains to a cop that the knife is designed to be gripped with ones fingers passing through any form of ring or guard that completely encompasses ones finger(s), then that statement can be used by a prosecutor to prove in court that the person knew they were carrying a knuckle knife. And such a statement would increase the chances of conviction.
I've lived in California for 46 years, and my criminal attorney and I have had a lengthy discussion on this topic. There is case law in California that makes it very clear that California courts take a very dim view of people possessing "metal knuckles" of any kind. And convictions for possessing such items have been upheld by the California Appeals Court.
Bottom line- knuckle knives, metal knuckles, and composite knuckles of any kind are bad news in California. People go to jail over them.
Getting caught carrying a concealed fixed-blade is a whole other nightmare in California. It is an offense that can be charged as a felony. And people go to jail for it all the time.