If you use good sharp pins, they glide right in the Pinmoor and stay on until you pull them off. I bought a package each time they went on sale and now I have all I'll ever need. I baste a king size quilt and fmq it and the Pinmoors do not come off even when wrestling the big quilt around. I have tried earplugs, foam pieces, earring backs, pencil erasers, door sealer strips and they do not perform like the Pinmoors for me. I can't stand pin pricks and if they didn't work I wouldn't use them.