Comprises of a large wheel and foot. Wind a seam binding  on the wheel and it feeds into the foot. Overlock into seams and shoulders , armholes which helps prevents stretching. Ideal for knit and stretch fabric.
Suitable for Category C and D models only.
 Category C - Models 334/334D/434D
Category D - Models 204D / 504D/6234XL/634D/644D/744D/8200D/9102D/9200D/9300DX