It adopts sliding bar thread take-up and vertical rotary hook to catch thread. The JK-820 machine can form two threads lockstitch. The arm shaft and hook shaft transfer the drive by high precise spiral bevel gear. Push button stitch regulator and lever style back sewing device makes the machine operation easily. It is designed with post bed of 178MM in height and provided with roller presser foot to perform sewing in wide space under-arm. It features manual lubrication, simple structure, low noise, smooth running and easy maintenance. It is available for corner sewing on leather shoes, sport shoes, leather bags, gloves and other similar articles.