The MyLock 744D is the most advanced MyLock mechanical overlocker that Janome has produced, with speeds up to 1300 stitches per minute. It features electronic control, a handy needle threader, and an easy Upper Knife release. An instructional DVD ensures that you'll be overlocking with professional results in no time. The 744D is Janome`s first overlocker with a free-arm. The free-arm allows you to overlock in tight places like cuffs and collars with ease. For instance, to attach a sleeve to a garment, you simply slip the turned out sleeve and arm over the free-arm and sew. The 744D has 2 needles and 2, 3 or 4 thread stitching capabilities. It's equipped with a differential feed (adjustable from .05 to 2.25) and an adjustable cutting width. This provides increased control for handling most types of fabrics and is essential for creative overlocking techniques.