Yoyo King Grind Control Professional Unresponsive Metal Yoyo with Wide C Bearing and Included String &hellip; (Black) NON-RESPONSIVE YOYO. The Yoyo King Grind Control yoyo comes with a wide, non-responsive C bearing. That means it only wakes up if you know how to do a "bind" to force it to come back. For advanced yoyo players who know how to bind only. Constructed of aircraft quality 6061 aluminum. Anodized for color, added strength, and corrosion resistance. Weight: 67 grams - Width: 41 mm - Diameter: 50.75 mm - Inside Rim Diameter 37 mm Unresponsive means it will not wake up like a standard yoyo and binding is required to bring the yoyo back up to your hand. Plenty of YouTube videos available to teach you how to do a bind trick! Silicone response system for superior play. Take apart design for ease of changing and untangling string. Includes a string. Dont forget to purchase extra strings, because yoyo strings wear out over time!