Compound feed “unison,” walking foot mechanism assures even feeding of several piles of slippery material Narrow cylinder arm – 50mm diameter – Semi-automatic lubrication system Simple wing nut adjustment permits raising and lowering of the center foot to allow for sewing different thicknesses of materia Sew up to 7/16″ — thread up to size 207 / Reverse feed It comes with sewing machine table and Electronic DC Servo Motor.Assembly required !