Bernette B64 Airlock 234 Thread Freearm Jet Air Serger, Micro Thread Control, Color Coded, Knee Lift Tension Release, Safety Door, Ext Table, 1300 SPM

Micro Thread Control (mtc) Used for the first time on a bernette machine, the patended mtc Micro Thread Control (mtc) saves you significant time and effort while ensuring consistent high-quality stitches, since you need only set thread tension once – even if you alter the cutting width and fabric thickness!