Review (1/5): Don't bother
Even if these were free they still wouldn't be worth the price. These blocks are so hard, they don't form to the nail at all. The grit us barely stuck on and flies everywhere with every swipe. You have to use at least 2 full sides of the block for each nail just to buff it, because all of the grit comes off before you smooth half the nail. It's annoying, aggravating, huge waste of time and embarrassing to use in front of a client.