The easy target acquisition (ETA) is specially designed magnetic base sight configured and optimized for use with Remington shotguns. HiViz front and rear sight set for Remington 870, 11-87 and 110 shotguns with the 9/32 inch wide rib. Front sight clips onto rib behind factory bead, comes with interchangeable Litepipes for front sight in green and red. Rear sight has green Litepipes and is fully adjustable for windage and elevation. Rear sight clamp to rib with hardware provided. Rear sight can be removed and the front sight serves a your bead for target shooting.