Super-durable, Never-Pop, High Standard Guaranteed - Tested strictly, stays assembled and unharmed even after thrown hardly onto the ground purposely (for test) multiple times, Never-pop structured and with angle blocks' splicing technology,the cube is high quality made. Speed, Smoother Turning,Best Handfeel Ever - A2ZSTORE Cube is made of ABS material, manufactured precisely to every inch, pre-lubricated, won't fail you the speed and smooth experience while playing as well as the most comfortable handfeel ever. Adjustable Tightness Degree - Quite easy to operate: open the center piece, then you can see the screw, make it into the tightness degree you want with a driver. Moderate Size to Go with You Anywhere - Barely takes room. Throw into your bag/backpack, would be a great accompany when you're on your train/bus home, break during long day work, waiting someone in a date, you can play it in any situation. Adjust the Degree of Tightness You Wish-Take off the middle piece of sticker of any colour then you can find the screw, drive it into the tightness degree you want.