STRONG, STURDY & LONGER LIFE: (1) ABS material, made safe, third-party lab tested, BPA free and non-toxic, stick-less smooth surface; (2) Small card corner design, POP free ability outstanding, stable and not scattered, it is difficult to remove; (3) The speed cubes has passed the US safety certification | EXCELLENT STABILITY: Great corner cutting ,Tension adjustable; It doesnt corner twist as often nor does it lock up; Difficult to pop, good control of the cube, comes pre-lubricated and tensioned; Definitely a good choice for you to improve personal record in competitions; This cube can be used for international competitions | BENEFITS OF SOLVING A BRAIN PUZZLE CUBE: (1) Improve your concentrations (2) Improve the hand-eye combination (3) Improve the spatial thinking increase IQ level (4) Improve overall cognitive skills (5) Keep the mind sharp in old age | THE PERFECT GIFT: Whether it is design or use, the feel is very good smooth and smooth, large angle cut corner, high fault tolerance Is a great cube; Your child will definitely like! This is a classic educational toy that will never be outdated; It is suitable for children, adults, and seniors; Hurry up to have it and let your big family have a fun and exciting speed cube game