HQ Groovy Boards create a precise pattern that can be used by all quilters, from beginner to expert. Made of durable plastic, these patterns can be used over and over with the same precise results. Handi Quilter recommends that customers purchase a minimum of two of the desired patterns to eliminate having to stop and mark your quilt projects. Using Groovy Boards requires a stylus and adapter. Use the center dot for placement on the quilt