The #50W three sole Bernina walking foot has a 9 mm needle gap in the foot. Designed to work specifically with Bernina models with a 9 mm stitch width.
 
Made to help prevent slippage and overstretching on tricky difficult fabrics.  Ideal for thicker fabrics and layers such as quilts, curtains, jeans and for stretch.
 
It is especially suitable for machine quilting straight lines with the added quilting guides for both left and right of the foot.
 
Has three detachable soles, closed toed standard, open toed standard and in the ditch stitching.