Once installed, Graph Tech's String Saver Series saddles don't just enhance the sound of any ST or TE-style electric guitar, but lengthen the lifespan of your strings. This pack of six, flat block saddles are made from PTFE-impregnated steel that injects the sound with more overtones while actually allowing the string to move and resonate naturally - rather than being held in place by a piece of metal. These saddles support narrow 52.73mm (2 1/16 inch) E-to-E string spacing and come complete with a height adjustment key so they can be fully set up.