... .3, It’s convenient to install on all kind of sewing machine. Widely used in garment, such as bra, underdress, swimsuit, underbrief ... . 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 ...