I recently purchased these just to see how they would work. Generally I don't have trouble pinning and matching blocks with opposing pressed seams, but there are times when that "ideal" isn't possible. Yes, I could use two pins to do the job and keep everything lined up. These are so easy - and I didn't have to take a single seam apart to achieve those elusive perfect points. Pricey (I think - but then I am from New England) but awesome. Just a shout out for a product I think you might like