Graph Tech ResoMax NVt Tailpiece Chrome Proprietary, lightweight ResoMax alloy increases harmonics in every note AutoLock magnetically locks the bridge and tailpiece in place without any tools to use or lose Triple plated chrome, Gold, nickel, black and black nickel finishes for years of durability Complete with the Graph Tech AutoLock locking feature, the ResoMax NVt tailpiece magnetically secures your bridge at all times without tools to use or lose, making restringings simple and quick The ResoMax NVt guitar tailpiece is the finishing touch to the Graph Tech ResoMax Harmonic Bridge System