This chain benefits from advanced techniques
for MX:

• chromed pins
• forged bushings and rollers
• lighter plates
• high grade steel for a longer life-span

Apart from the look, 3 major improvements have been made:

• Increasement of the Push out Force between the pins and the outer plates.
• Increasement of the Push out Force between the bushes and the inner plates. These 2 elements will limit in a very important way the phenomena of hard points on your chain and what will allow you to keep a very good flexibility throughout the use.
• The most significant improvement is the increase of the fatigue strength, we have increased it by about 20% compared to the A520MX5, this means that your chain will stretch less and less quickly.