The Echo Feet Kit is a set of three feet, each fitted with an acrylic ring that extends the width of the hopping foot. The feet provide a fixed interval to use when echo quilting around a motif or using rulers. The Echo Feet provide a 3/8-inch interval (blue), a 1/2-inch interval (pink), and a 3/4-inch (yellow) interval. NOTE: To use HQ Echo Feet, the machine must have been purchased after November 2014 or you first need to install the Handi Feet Conversion Kit.