1/4 InThe ¼” Ruler Foot was specifi cally designed to use for ruler work using Janome quilting rulers. 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. * Using the straight stitch needle plate is recommended for better results when using high/low shank horizontal rotary hook models.ch Ruler Foot for for Low-Shank Horizontal Rotary Hook Models (7 mm maximum width)