Vintage #2 Greist Buttonhole Worker Maker Buttonholer Attachment Complete with 4 different sized cams, feed cover plate and screw, and instructions, all held neatly in it's original box. This is for top clamp machines - just remove the big nut around the presser bar and clamp this attachment directly to the bar. The cams fit in the bottom of the attachment and make perfectly formed buttonholes quickly and easily.