Newtone Michael Messer Resonator Guitar Strings were established in 1992 and are the ultimate strings for all resonator guitars. Handmade from the finest materials for extra volume, sustain and purity of tone. These strings are designed to have perfect tension on resonator guitars whether you play in regular or in open tunings. At first sight these gauges seem very heavy. By utilising a principle used in the 1920s that uses a round core rather than the more modern hexagonal one, greater string life and easier playability can be achieved.