The Handi Quilter HQ Frame Caster is designed for straight-legged frames, making it easy to add wheels to your quilting setup for increased mobility. These casters are compatible with the HQ Little Foot, HQ Studio, HQ Studio2, HQ Studio3, HQ Fusion, HQ Gallery, and Gallery2 Frames. Depending on your frame’s length and number of legs, you’ll need four to eight casters, with each replacing a leveling foot. Please note, these casters are not compatible with the original HQ Avante or HQ Fusion frames with curved back legs, and they do not fit the InSight Table. Sold individually for flexibility.