JK-6658 Heavy Duty Compound Feed Lockstitch Sewing This model is an improved product based on Gc0658,and specially designed for heavy weight fabric and leather,With its powerful feding system,wider presser foot lift and longerstitch length,the sturdily structured machine can easily deal with laborious material and thick sewing thread.Lt features quiet sewing and compoung feeding by feed dog,needle and walking presser foot,best fit for sewing bagslunguage cases,sofa cushions,boxing gloves,leather products,ets. JK- 6658- D1 is used with electric speed adjusting motor and micro control bos for thread trimming. JK- 6658- D2 is used with servo motor andcontrol box for qutomatic thread trimming,automatic needle positioning and automatic backtacking. TECHNIC PARAMETER SHEET JK- 6658 Best fit sewing bags,luggage case,sofa cushions,boxing gloves,leather products,etc。 DP* 17 18- 22# 1 7 7- 13 2200 /  / O 580* 250* 530 25.5/ 32.5 JK- 6658D- 1 Best fit sewing bags,luggage case,sofa cushions,boxing gloves,leather products,etc。 DP* 17 18- 22# 1 7 7- 13 2200 /  O O 580* 250* 530 25.5/ 32.5 JK- 6658D- 2 Best fit sewing bags,luggage case,sofa cushions,boxing gloves,leather products,etc。 DP* 17 18- 22# 1 7 7- 13 2200 /  O O 580* 250* 530 25.5/ 32.5