... qsingle/double needle drive roller preser post-bed lockstitch sewing machine Features:1.Due to special unison feed, no wrinkle ... bearing design, which can reduce friction and the damage of machine parts, low noise.4.Easy to adjust seam setting. ... presser post-bed lockstitch sewing machine)Application:Suitable for sewing sports shoes, work shoes, boots, ski shoes, inline-skates, locomotive shoes, cotton ...