Product Name: Straight Button-Holing Sewing Machine Dk781 Model NO.: DK781 Automatic Grade: Semiautomatic Condition: New Classification: Sewing Machine Nailcatcher Machine Stitch: Lock Stitch Buttonholing Machine Type: Flat Head Buttonholing Machine Type: Garment Product Description DK781, Two choices of stitch pattern , whip stitch and purl stitch .with adjustable botton-hole length /width and stitch amount , automatic lubrication system and thread trimmer .Applied for button-holing on ordinary or knitted material with light or heavy weight .