... : with Max. 700 rpm, low thread breakage, and big rotary hook (180 m thread). 2.Auto oil lubrication system, to lower the ... noise.3.Better stitch and suitable for both thin and thick quilting, over ... , easy to combined patterns, joint patterns and jump patterns.2 bars machine: patterns can be 1, 2, 3, 6; 4 bars machine: patterns ...