Titanium and Brass Bridge Pins for acoustic guitars! It looks like titanium and brass upgrades are not just for locking tremolos (or breakfast) anymore. Take your acoustic guitar to the next level with the ultimate in acoustic upgrades. This is the easiest and most dramatic upgrade for your acoustic guitar. I don’t know an electric tremolo player who does not have an acoustic guitar too… If you are a tone whore like me, these are for you! Increased sustain, clarity, definition and TONE!