4x4x4 YJ Moyu Weisu Black Speed Cube Puzzle Smooth Toy 4x4 This cube is smooth right out of the box, for better quality need lube, tension, and breaking in time It is a fast cube with great corner cutting, fair on the revise Some might say it is better than any 4x4x4 in the market right now The middle layer rarely lock up to almost none for some cuber If your turning style is light then this cube is perfect for you, but if you're a rough turner the inside piece of the cube will pop out when you solve