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| RELIABLE PERFORMANCE AND INDUSTRIAL QUALITY | ||||
 Lay-in Thread Tension Dial The concealed threading path assures stable sewing results. |  Handy Needle Threader The convenient way to thread your needle and insert a new needle. |  Slim Foot Smooth Fabric Feeding with Double-row Feed Dog Easy Fabric handling with this overlock foot. | ||
 Convenient Thread CutterBy lifting the presser foot, the thread thensions are automatically released so that you can draw the threads smoothly when changing the threads. Threads are securely inserted between the tension discs when rethreading.
|   Differential Feed MyLock 644D is equipped with a unique differential feed device designed to prevent fabrics from puckering or stretching. The ratio of differential feed can be selected from a range of 0.5 to 2.2. Both stitch length and differential feed dials can be set at any time, even while sewing. | |
| Easy Roll Hem Change-Over No need to change the needle plate for rolled hemming. Just slide the needle plate setting knob to the "R" position to switch the chaining finger to that for rolled hemming. | ||
 Easy Lower Looper Threading By rotatign 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. | ||
 Easy Upper Knidfe Release Upper knife can be quickly and easily deactivated by the slide of a knob. |  Adjustable Cutting Width By turning the dial, you can easily adjust the desired cutting width from 3.1mm-5.1mm | |
 Lower Looper Pre-Tension Setting Slider Easy to adjust the looper thread tension for rolled hemming. |  2-thread serging works well with thick thread, flat lock stitch, and when overlock sitiching stretch materials. |
 Install the spreader attachment on the upper looper for 2-thread serging. |  Changable Thread Guide You can change the thread tension setting depending on whether you're doing 3-4 thread serging or 2-thread serging. |
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