The fabric holders in the top picture are not used together. You use whichever one fits the space you are quilting in. Just place it on your quilt sandwich and hold it with your hands (personally I found it just as easy to use my hands) but because there is sponge on those holders they are meant to help grip the fabric. I think it's Sharon Schamber's who has a similar item & has a video on it.
oops, someone types faster than me :lol: