Adjustable windage and elevation screws. Comes with one disk. For percussion or late flint. Works well on rifle or pistol. 19194 Full buckhorn, wax cast steel with app.
Small notch is just more than indexed for centering.
File as needed for height and shape. 19195 Full buckhorn wax cast steel. Needs little work to clean up steel. Needs little work to finish. Because of the base to notch height, this is a good sight for rifles that shoot low.