Quilting Pins

I was using pins with a bulky head and of course, when I rolled the quilt on the frame, there were bumps from the pin heads. I recently learned that these flower, flathead pins come in more than one thickness - the ones provided with my Qnique 21 Pro (white) are strong enough to hold the various layers of my sandwich on the Continuum frame. I like how the flower head covers the point of the pin next to it. These are stronger than the blue or pink ones I also have for piecing/sewing.