Stamping Ease
Plain clear blocks have worked for me, but not like these! I can finally get those long, thin acrylic borders straight (if straight is what I'm going for). Even just having those lines show through to the paper on whatever layout or card you are making, makes it so easy to see if you are stamping in the right area so that it still shows up when you put that 2inch border of paper above it. It is just perfect for helping your stamping, which could mean your scrapbook page, to turn out just the way you wanted it.
And if nothing else, the edges make for a much more comfortable grip.