This model is designed for replacing the standard Fender style 2-post tremolo on Strat style guitars. It has patented "Blade" technology, with truly frictionless action, and a positionable whammy bar. The BladeRunner maintains the classic trem style, but out performs all other non-locking tremolos. String spacing is 2.1” – works perfect for both vintage and modern string spacing. Kit comes complete with bridge, bar, inserts with mounting screws, and springs. Available in right or left handed, Triple Nickel, Gold, Black Nickel or Hot Rod finish or build your own style BladeRunner in our Custom Shop. The BladeRunner is best non-locking tremolo on the market today with simple installation in minutes. US Patent #7,297,851.