The ResoMax NV1 harmonic Bridge is designed to maximize harmonic content and richness in every note, retain the bite of a metal saddle, dramatically reduce string breakage and make restringing a breeze! The ResoMax NV1 harmonic bridge is made from a proprietary, lightweight ResoMax alloy that will leave each note dripping in tone and harmonics. The guitar bridge is equipped with super hard ResoMax saddles constructed of the same harmonically rich ResoMax alloy to retain the 2KHz bite of metal saddles. The AutoLock locking on the Graph Tech ResoMax NV1 feature magnetically secures your guitar bridge at all times without tools to use or lose, making restringing simple and quick.