Features:
1) Direct drive  
2) Bottom feed, walking foot
3) large hook, automatic lubrication by oil pump
4) Automatic thread trimmer, backtacking, and auto-lifter
Applications: 

For sewing medium and heavy weight materials, such cas bags, suitcase, canvas, etc

Specifications:
1) Max sewing speed: 2000spm
2) Max stitch length: 8mm
3) Presser foot lift height: 8mm by hand, 16mm by knee
4) Needle bar stroke: 37mm  
5) Needle: DP x 17 20#-23#