Advantage for Above Roller Feet 1.The workpiece, such as rubberized fiber and leathers, can be sewed more smoothly.  2.Eliminate the need of additional puller, wheeling machine, needle feed machine and walking foot machine in some case. 3.Reduce the friction and eliminate the need of lubricant. 4.Higher durability than Teflon or Rubberized presser foot by more than 200 times.