The Gamma Crash is machined from POM plastic with aluminium hubs and stainless steel weight rings. The process of machining makes the yoyo a lot more stable than traditional injection moulding, because the density of the plastic is consistent throughout. Don’t be fooled by the plastic! The bi-metal plastic combo means that it does not play like a plastic yoyo at all. It feels like a high end performance yoyo. It’s a great all-rounder that can perform fast and smooth, or more relaxed and flowing.