Genuine Kluson Milled Steel Lefty Vintage Strat Sustain Tremolo Block - Nickel Part # KVSB LH Klusons updated take on a sustain block is an exact fit for vintage USA Kluson Stratocaster tremolo bridges. Machined from cold rolled steel and featuring all US threads, this will bolt right on to a 1957 tremolo, adding the sustain and tone only a steel block can give. This is a great option for an original bridge that may have had its threads stripped out over many years of playing and needs a replacement block. Left handed tremolo use only. Buy