[. . . ] [. . . ] This ratio can be set anywhere from 0. 5 to 2. 25. Differential Feed 0. 5-1. 0 Adjustable Cutting Width. Easily Retractable Upper Knife. Differential Feed 1. 0-2. 25 Easy To Reach Lower Looper Guides Quick Change Rolled Hem SPECIFICATIONS SEAM TYPE: 2 and 3/4 THREAD OVERLOCK NEEDLE: REGULAR TYPE (15x15P) SEAM LENGTH: 1-5mm SEAM WIDTH: 3. 5mm (regular); 5. 7mm (wide); 2. 00mm (narrow) DIFFERENTIAL FEED RATIO: 0. 5-2. 25 NEEDLE GUARD: FRONT & BACK CUTTING WIDTH: ADJUSTABLE UPPER KNIFE: RETRACTABLE TENSION DIALS: NUMBERED (ONE ROTATION) THREAD GUIDES: COLOR-CODED PRESSER FOOT: SNAP-ON TYPE SPEED CONTROL: ELECTRONIC Threading the Lower Looper is a breeze when you have easy access. Just rotate the thread guide and the lower looper thread guides pop into view. STD. Just slide the needle plate to "R" position and choose "R. H. "on the lower looper pre-tension setting slider. Solid metal base plate keeps machine stable, quiet and smooth running. [. . . ] [. . . ]