HIVIZ Remington ETA Front and Rear Sight Set 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 can be removed and the front sight serves a your bead for target shooting Rear sight clamp to rib with hardware provided