It’s for low speed over lock machine. For garment, knitted wears. Needle size 9# to 11# : suitable for sewing hemming bottoms on T-shirt, underwear & sport wears and handkerchiefs, head dress & silk scarves, and back latching on panties, T-shirt ; Size 11#, 14# and 16# : suit able for sewing hemming shirts, knitted fabrics swimming wears trousers and twill fabrics(jean fabrics).Equivalent systems include: 621; 81X1; 82X1 ; MY1023A; SY1225.
