A double bass bow is a specialized tool used to play the double bass, a large string instrument. It typically features a curved shape and is made from materials like wood or carbon fiber. The bow has horsehair stretched between its ends, which is used to produce sound by drawing it across the strings of the instrument. There are two main types of double bass bows: the French bow and the German bow. The French bow has a more pronounced curve and is held underhand, while the German bow is straighter and held overhand. Each type offers different playing techniques and styles for musicians.