Dunlop 6100 Fretwire The largest fret wire available. 110″ x .055″. Jumbo 6100 fret wire can provide easier playability with better sustain, tone and bending because you don’t have to press as hard to fret the strings, but your fingers probably won’t even touch the fingerboard, which could take some getting used to if you’re accustomed to smaller frets. 18% nickel/silver hard alloy. 24 units.