Before starting our stamped concrete project, I had to round up a few different kinds of these stamps. Even though it was our first time stamping concrete, we got some very decent looking effects on our cement work. Made me feel like a pro. These stamps MUST be used with release agent powder in order for them to work! I think this item is a little overpriced for what it is, however it was definitely a whole lot cheaper getting it here than trying to get similar ones from our local concrete tool supply shop.