The MyLock 644D is equipped with a unique differential feed device designed to prevent fabrics from puckering or stretching.
Easy to adjust the looper thread tension for rolled hemming.
You can change the thread tension setting depending on whether you’re doing 3, 4, or 2 thread serging.
By rotating the thread guide, the lower looper thread guides will become accessible to make threading easier. The lower looper thread guide will return to its original position automatically by turning the handwheel.
Upper knife can be quickly and easily deactivated by the slide of a knob.