And just to pin it to the wall,
2014 Oklahoma Statutes
Title 21. Crimes and Punishments
§21-1431. Burglary in first degree.
Universal Citation: 21 OK Stat § 21-1431 (2014)
Every person who breaks into and enters the dwelling house of another, in which there is at the time some human being, with intent to commit some crime therein, either:
1. By forcibly bursting or breaking the wall, or an outer door, window, or shutter of a window of such house or the lock or bolts of such door, or the fastening of such window or shutter; or
2. By breaking in any other manner,
being armed with a dangerous weapon or being assisted or aided by one or more confederates then actually present; or
3. By unlocking an outer door by means of false keys or by picking the lock thereof, or by lifting a latch or opening a window, is guilty of burglary in the first degree.
R.L.1910, § 2611. Amended by Laws 1979, c. 43, § 1, eff. Oct. 1, 1979.
Try as you might, you'll not get a firm definition of "dangerous weapon" in OK, leaving it up to the court to decide by the looks of it.
All the legal links I can find seem to agree that
both knives and brass knuckles will be regarded as dangerous/offensive (it seems to be interchangeable) weapons.
ETA.
OK Unlawful Carry law defines both knives and brass knuckles as offensive weapons.
It shall be unlawful for any person to carry...
any dagger, bowie knife, dirk knife, switchblade knife, sword cane, knife having a blade which opens automatically by hand pressure applied to a button, spring, or other device in the handle of the knife, blackjack, loaded cane, billy, hand chain, metal knuckles, or any other offensive weapon, whether such weapon be concealed or unconcealed,
HTH