The Yamaha X120 (YH46) key blank is an uncut key that is compatible with various lock systems. It is commonly used by locksmiths and key cutting professionals as a replacement or spare key. The X120 (YH46) key blank has a cross reference to other key blanks, such as the Curtis YM-57, Ilco X120, Ilco EZ YH46, Jet YH46, JMA YAMA-18I, and Silca YH28R. It is a durable and reliable option for those in the locksmith industry.