1. ERGONOMIC DESIGN Awesome Looking, everyone will love the way it looks. The sticker actually provide a decent amount of grip. Solid sticker will not peel off easily. Crafted with original and ABS material, non- toxic, harmless to human and environment. 2. EXCELLENT STABILITY It doesn't corner twist as often nor does it lock up. Difficult to pop, good control of the cube. Definitely a good choice for you to improve personal record in competitions. This cube can be used for international competitions. 3. WHY WE AVOID BIG ROUNDER CORNERS DESIGN BETWEEN PIECES? Big rounder corners affect the aesthetics of the puzzle, and affect surface flatness, so we use smaller circles to maintain the stability on a flatter outlet structure and inner appearance. 4. DESIGN DETERMINES THE HEIGHT Using the conical spring extended into the center pieces housing, this reduce the spring noise due to the contact of spring and washer. On the inner side edge pieces, we added 2 tracks to make it anti stickiness between pieces in contact, the smaller contact surface reduce friction and thus improving the smoothness of the puzzle. On the center caps we make 4 concave surfaces, this prevents nails from accidentally prying opening the center caps.
