The Metal Stone Face packet is a very helpful tool for any blader seeking to make good beyblades! It adds extra weight to the beyblade which makes it more powerful in attack potential and it also makes defense types a lot harder to beat! The best part about this is that you can customize the alignment of the plastic and metal, you can make it all plastic, all metal, and half plastic half metal in two different ways. Using half metal half plastic or full plastic helps your stamina beys spin for a much longer duration of time. This product is all types of great and I think every blader should own at least one of these!