Fender introduced the Precision Bass (P-Bass) in 1951. The P-Bass was the first electric bass and was a smash hit. The Precision bass included a Slab double cut away ash body, a single coil pickup, one piece 34" neck (Maple). The early Pbass also featured large Kluson tuning machines heads. These were later replaced by conventional geared tuning machines. In 1957 the pickup was upgraded to a split double coil pickup and a wider head stock was added.