Product Features Each CenterMass sight is meticulously designed to mount at the centerline of the bow to help eliminate offset weight. The individually micro-adjustable .019 Pro Pins have a narrower pin throat that ends in a perfectly matched round pinhead that allows for less target blackout. The high-performance PhotoChromatic shell adapts pin brightness to all light conditions for perfect pin clarity. The Dual Indicator System reduces time and movement by providing a needle for shorter yardages combined with a 2nd needle for longer-range shooting. 3rd Axis Micro-adjustability, with 1st and 2nd non-micro adjustable axis.