This machine is subclasses into single needle and two needle versions. It is designed with link lever thread take-up, vertical rotary hook, compound feed by driven roller presser foot, roller feed dog and needle, to produce lockstitch. It uses precise cog band for driving arm shaft and hook shaft, knob type stitch regular and post sewing bed. With needle bearing and ball bearing used the key moving positions; the user can obtain elegant stitches. Smooth and quiet running and quiet running and excellent sewing performance. So it is especial available for sewing on medium heavy weight articles with small radius, such as superior leather shoes, handbags, gloves, caps etc. it ensures you easy daily maintenance.