Penal Code - PEN 21710. PART 6. CONTROL OF DEADLY WEAPONS [16000. - 34400.] TITLE 3. WEAPONS AND DEVICES OTHER THAN FIREARMS [19910. - 23025.] DIVISION 6. KNUCKLES [21710. - 21890.] CHAPTER 1. Composite Knuckles or Hard Wooden Knuckles [21710. - 21710.] Any person in this state who possesses, commercially manufactures or causes to be commercially manufactured, or who knowingly imports into the state for commercial sale, keeps for commercial sale, or offers or exposes for commercial sale, any composite knuckles or hard wooden knuckles is guilty of a misdemeanor. Added by Stats. 2010, Ch. 711, Sec. 6. (SB 1080) Effective January 1, 2011. Operative January 1, 2012, by Sec. 10 of Ch. 711.