It is suitable for parallelrows of chain stitches of the lingt weight and medium-weight materials.lthas the features of reliable and simple mechanism and wide range of the needle gauge. KX81 4mm DP?7 16#-21# 3500s.p.m. 6-10mm 40kg 3.2/4 4.8/6.4 8/10/12.7 #18 370W 640?230?/SPAN>590