Cutter / Serger foot. Cut and sew at same time! Instructions should work with any cutter foot. The one in the video is the OnEver side cutter foot for low-shank sewing machines (purchased from Amazon for $7.99. Sewing machine used is the Brother full size lightweight model JX2517 serger machine, serger sewing machine, side Cutter Sewing machine attachment sewing machine that cuts and stitches at same time. sewing machine that cuts and sews at same time side cutter foot