This is an exquisite replacement front sight Winchester rifles. It is modeled after the number 21 front sight with the dark blade and set screw. This sight measures .375 high. This sight came from the factory on 1873, 1894, 1892, 1895 rifles. It fits into the 3/8 inch dovetail on the Forearm of the barrel and has the set screw in the base of the sight. (which is great if you have a loose dovetail slot! be gentle with the screw though, do not over tighten)