The Steinberger SST-106 6-string Guitar Light Calibrated TransTrem strings are double-ball strings for Steinberger headless TransTrem guitars. These double-ball strings lock down on the bridge for incredible, Steinberger-signature stability. They also facilitate extremely fast string changes. Slap on a pair of Steinberger SST-106 double-ball strings and dial into tune using precise micrometers rather than standard tuners ' when you get in tune, you stay in tune. When you need to re-string your Steinberger, look no further than Steinberger double-ball strings like the SST-106s.