The ¼” Ruler Foot was specifically 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. Foot is compatible with high shank models (9mm or 7mm maximum width) Horizon Memory Craft 12000, Horizon Memory Craft 14000, Horizon Memory Craft 15000 V2, Horizon Memory Craft 8200 QCP, Horizon Memory Craft 8900 QCP, Horizon Quilt Maker Memory Craft 15000, Horizon Quilt Maker Memory Craft 15000, Memory Craft 6700P, Skyline S3, Skyline S5, Skyline S7, Skyline S9.