The diabolo is the yo-yo unleashed! It's another fun, hand-eye coordination enhancing game with an infinite number of tricks able to be performed. The object is to get the "toss" spinning on the string then, throw it up into the air, over your leg, around the world, on your handle stick or anywhere else. Each set comes with an illustrated instruction booklet to teach you beginner, intermediate and advanced tricks. This Diabolo is great for beginners and experts alike. The handles are hardwood dowels with 140# test kite string. The string is adjustable for all user heights and preferences. The Diabolo toss is very rigid and durable but, has a little give to it so it can handle very hard landings. The outer rings of the toss have extra weight for optimal stability and control in very high speeds. The fabricated steel axle is made of just one, solid piece.