It is suitable for paralle rows of chain stitches of the heavy weight and medium-weight materials.It has the features of big hook and wide range of the needlegauge. KX87 4mm DP?7 16#-21# 2300s.p.m. 6-10mm 45 3.2/4 4.8/6.4 8/10/12.7 370W 640?230?/SPAN>590