Features: Sensory Enhancement Design: Mini finger skateboard accessories encourage and enhance children's sensory development, exercise hand and brain coordination, and stimulate hand-eye coordination skills. Promotes DIY creativity and customization of finger toys. Quality Material: Made with quality alloy bearings, smoothly rounded and polished without burrs. Wear-resistant and non-toxic materials enhance the overall play experience. Easy to Assemble: Finger skateboard wheel set includes all necessary accessories for easy assembly and replacement. Universal size fits most mini finger skateboards, extending their usable life. Durable Replacement Parts: Durable deck, wheels, and brackets designed for replacing worn components on mini finger skateboards. Supports extended use and provides fun, portable indoor activity while promoting finger dexterity and motor skill development. Color: Silver Material: Zinc Alloy Size: 29mm Package Contents: 1 x Small Screwdriver (random color, no specific color selection) 10 x Truck Sets (each set includes screws, wheel nuts, and sps) Note: Light and display differences may cause slight variations in color between the image and actual product. Measurement error allowance is +/- 1-3 cm.