Consew 206RB-5 Triple Feed, Heavy Duty, Single Needle Extra long stitch - 21/2 S.P.I. (10mm) | Large Bobbin:Bobbin can be changed without removing object being sewn | Tread release finger (for heavy thread) | High presser foot lift - 9/16" (14mm) Centralized arm lubrication: Reservoir-oiled hook with micrometric control valve | All gear driven hook mechanism Large horizontal axis hook | Safety clutch with push-button re-engagement | Adjustable reverse stitching can be same length as forward stitc Walking feet, needles and other attachments interchangeable with Consew models 226R-2, 255RB-2 | Needle plate, foot and feed dog can be changed for special operations Standard attachments easily installed | Compound feed, walking foot mechanism insures even feeding of material Locking stitch regulator prevents changes in stitch length from vibration