Q Snap Frames are a unique method to hold fabric drum-tight while you work. Four plastic C-shaped clamps hold the fabric onto the bars. Tension is easy to adjust. You have a smooth stitching surface around entire frame without “hoop wrinkles”. The Q-snap frame comes apart in seconds to store or to carry in your craft bag. There are 3 sizes and also 3 inch extension pieces are available to enlarge a frame.