Material:Alloy Feature:Hold spinner in one hand and use the other hand to spin it rapidly using continuous strikes to keep it spinning. With more practice spinners can be spu, using one hand only using the fingers of one hand to stop and start spinning. These are perfect pocket pieces for people wanting something small, simple, handy and fun toy. Also effective for focus, stress relief and deep thought. Hand Spiner:6.5x6.5x1.4cm