For single needle lockstitch machines (Singer, Juki, Brother, Mitsubishi, Etc.)Works on a wide range of fabrics, even jeansAvailable with either 4 or 8 stitches per pleat (Giving extra strength per pleat)Depth of pleat adjustable from 0 to 10mmFeeding amount of pleat controlled by screw on attachmentDistance between pleats adjusted by feed dog in machine.Each stitch get ruffled