MAGICYOYO Responsive Metal Yoyo Professional yoyo K7 Aluminum Yoyo for Beginners Kids with 5 Strings Gifts+Bag+Glove-Red Responsive Yo-yo MYY K7 with Slim bearing Excellent yoyo for beginners learners to learn tricks High Quality for kids, friends, String length may be adjusted by the user. Adjust the string length by letting the yo-yo hang to the ground and tie a new loop at belly button height. Aluminum Body and Plastic Hubstacks, Steel axle for smooth spinning Include:1 *K7 MAGICYOYO, 1 *Glove, 1 *YOYO Sack, 3 * Repalcement Strings Optimized to find the best balance, long spin times, stability, and ease of catching on the string <br> K7s big ball body shape adds weight to the outside edges of the yoyo for long fast spins. Silicone response system. Ball bearing axle for super long spin times! Includes yoyo strings. Narrow C sized bearing. If you like nonresponsive yoyoing, put in your own wide C bearing and you&#039;re all set. Durable plastic construction. 1.Remove the string firstly 2.Take a look at whether the ball is loose and the two hemispheres must be tightened well 3. Attach the string properly.(The most important thing)