This foot is designed specifically for ruler work: you will have more visibility with the V-shaped front, while markings on the foot will help sewers find the center point. The ¼" cup height moves smoothly alongside the quilting ruler without allowing the ruler to slide over or under. With this foot, the needle drops a ¼ inch away from the ruler to create the quilting line. Please note this foot is to be used with 9 and 7mm, high shank top-loading models. It's also recommended that you use a straight stitch needle plate for better results.