... competitive.3, It’s convenient to install on all kind of sewing machine. Widely used in garment, such as bra, underdress, swimsuit, ... There are 26 mode memories, which make sewing operating more effecient and realiable. 2, Sewing machine type: Z for zig-zag, K for ... overlock, and C for coverstitch3, Adaptable sewing machine brand and model4, SY is short for synchronizer, witch is ...