Husqvarna Viking Sensor One-Step Buttonhole FootThe Husqvarna Viking Sensor One Step Buttonhole Foot measures as it sews, guaranteeing each buttonhole will be the same size as the first. The Husqvarna Viking Sensor One Step Buttonhole Foot measures buttonhole length and sews the buttonhole size that has been entered into the machine. Viking snap on foot. Fits all models with the Sensor Buttonhole Foot option excluding Epic models, Ruby 90 and Sapphire 85. This is a special order item, allow an