* Differential feed* Built in rolled hem* Safety switch* Free arm* Colour coded threading* Rolled Hem* 3/4 thread Overlocking* 2 year guarantee The Necchi DF4 Overlocker provides everything you need to create great ready-to-wear garments. Silk to leather & so easy to thread, it has two needles & can be used as 3 or 4 thread overlocking incorporating the differential feed ratio is adjustable from. 05 to 2.25, providing increased control for handling all types of fabrics. Threading is simple, with colour coded guides & a self threading lower looper. This Overlocker switches to rolled hemming without changing the needle plate.