The Little Rotation Bobs are for marking evenly spaced rotations when using tools such as the Spinning Waves, these are great for use when quilting on a domestic sewing machine.
Ruler foot is not included and must be purchased separately if you do not already own the foot
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Sew Steady Westalee LRB Little Rotation Bobs for Marking Evenly Spaced Rotations
Pamela H, Aitkin MN I was totally satisfied with my experience. I sent a lot of time at the site and found it very easy to navigate. It would be nice, though, if there was a separate category for the Westalee products that would allow a shopper to see all of the products at once without continued re-searching. I probably would have purchased more items if it would have been easier to compare choices.