Martin Luxe Liquidmetal Bridge Pin SetLUXE BY MARTIN bridge pins are just another example of the companys mission to constantly improve the tone and playability of our guitars. These high tech pins are made from Liquidmetal, a Zirconium alloy, that reflects energy instead of absorbing it. The result is an increase in volume and sustain, without sacrificing the low end, or richness, of the guitars tone. In addition, they are extremely durable and will last significantly longer than most