This gliding foot is specially designed for sewing with thick fabrics.
Part of the base of this foot is spring loaded which automatically adjusts to move over bulky seams.
There is an aditional spring that can sit below the snap on adapter to add more pressure to the foot which holds the layers of the fabric tighter.
This means your machine will glide over thick layers with ease and stitching stays even.
Will fit most low shank snap-on machines.