Each spinner features 6 adjustable chains, movable joints, and a smooth center bearing for fun hands-on fidget play. 【30PCS Transformable Robot Fidget Spinners】Includes 30 transformable robot fidget spinners in 9 mixed styles and bright colors, giving kids more pieces to share, collect, spin, and transform. 【Durable & Smooth to Play】Made of durable plastic with smooth edges and sturdy movable joints, these transformable spinner toys are designed for repeated spinning, bending, and shaping.