Designed by a World Champion for the equal balance of accuracy and speed required in all realms of Practical Shooting. The wider and also deeper rear notch combined with a fiber optic that sets in the very top of the front sight makes them unique and desirable for 'calling your shots' during high speed shooting. Specs: Black Nitride finish. Rear: Serrated 40LPI with double set screws, .250 tall, notch is .150 wide and .130 deep. Front: Serrated 40LPI, .220 tall, .117 wide, fiber optic size .040, includes hexagonal mounting screw and 2 inches of red fiber optic.