It is an attatchment that helps you to sew perfect circles of various sizes..
You snap it on after adjusting the size you want and pedal to the medal and you have sewn a perfect circle. I am thinking of it for use with decorative stitches for some quilting...or decorating denim skirts...it would be great for Cathedral Window's.... I just realized I sound like a infomercial :roll: :oops: :lol: Or am I trying to justify the purchase to myself??? 8) 8) 8)