Can be applied to double-needle-sewing cuff, bagging the front of work clothes, the part of knee of trousers, knit goods, bra, etc the like, waist line of trouser, Jeans, work clothes, coats, raincoats, jackets, shirts. Applied to a wide range of sewing materials and adopt synchronized feeding by needle and feed dog, which can prevent slippage between layers of materials. They can perform two-row of parallel stitching and decoratity. The use of large hook on TJ-872 reduces the frequency of changing bobbin. It is developed for hemming shoes, purse, belt for sewing bag, sofe and for shaping sport apparatus.