Ultralight construction. State-of-the-art components. A symmetrical shape with interchangeable parts allows you to adjust the size. The M42 is designed to fit every player perfectly. With its ambidextrous shape and interchangeable parts, the M42 is engineered for a comfortable fit—regardless of your hand size or grip style. The most powerful gaming sensor from Pixart, the 3389. Pro-player optimized Omron switches for 20,000,000 clicks. The M42 is equipped solely with high-quality components.