There is yarn covering head in front of its needle plate(the unitreceiving idle yarn ring),and this unit packs idle yarn ring into over seaming yarn and reduce knot stps,and has special release device(called mean yarn device),and releases two yarns while raiseing up presser foot.It is applicable to drawers and T��shirts...

For attahing elastic on non-woven,plastic cloth or shower cap etc. HM737-04/TR 1 3 - 2��4 0.7-2 3.6 3.5 #11 3000

To sew a knit tape and turn it into a spaghetti tube on swimwears,nightgowns,and fitness clothing,etc. HM737-B 1 3 - - 0.7-2 3.6 6 #11 3000