Arizona's knife laws are notably permissive, allowing adults 21 and older to openly or concealed carry nearly any type of knife, including fixed-blade knives, without a license or blade length restrictions. State law preempts local ordinances, ensuring uniform regulations. However, carrying knives is prohibited in specific locations like schools and government buildings, and certain individuals, such as felons, face restrictions. The state emphasizes that knives are considered tools unless used criminally, in which case they are reclassified as deadly weapons, incurring enhanced penalties.