Side-handle batons (sometimes referred to as T-batons) are batons with a short side handle at a right angle to the shaft, about from one end. The main shaft is typically in length. They are derived from the tonfa, an Okinawan kobudō weapon, and are used with a similar technique (although tonfa are usually used in pairs, whereas side-handle batons are not). The best-known example is the Monadnock PR-24; "PR-24" has become a genericized trademark within the law enforcement and security communities for this type of product.