... It’s convenient to install on all kind of sewing machine. Widely used in garment, such as bra, underdress, ... 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 ... Digital metering device HDE8-C for coverstitch sewing machine