Wisamic Yoyo God of Death Unresponsive Professional Alloy Aluminum Bearing SmartU Yo-Yos Balls Yoyo Ball with String Black Superior performance and competition play. It is not only for daily entertainment, but also for acrobatic performance with most entertaining fancy. Designed to train fine motor skills and eye-hand coordination. Awesome for kids, adults, friends, family, anyone that wants to enjoy hours of fun. Style: String Trick (1A, 3A); Material:Aluminum