This machine is sub-classed single needle and two needle versions,lt is designed with link lever thread take-up,vertical hook,compound feed by driven roller presser foot,roller feed dog and needle,top reduce lockstitch.lt uses precise gear band for driving arm shaft and hook shaft,knob type stitch regulator and post sewing bed.With needle bearing and ball bearing used in the key moving positions,the user can obtain elegant stitches,smooth and quiet running and excellent sewing performance.So it is especially available for sewing on medium heavy weight articles with small radius,such as superior leather shoes,hand bags,gloves,caps,etc.It ensures you easy daily maintenance.