K6-UT: Fully Automatic Cylinder Arm Coverstitch 220vHigh speed, 3 needle, 5 thread, direct drive cylinder arm interlock machine with automatic functions like thread trimmer and presser foot lifter. Step Motor Footlifter The presser foot lifter is controlled by a stepper motor making it twice as strong and long lasting as the old magnet. Step Motor Thread Trimmer ( UT) Even the thread trimmer is controlled by a stepper motor which gives it a quick response and makes it extremely silent ( 6dB). High