Red River Sight Co. made this tang sight stem for antique Lyman #2 tang sights except the 1886 Winchester sights. By installing this stem to a #2 Lyman tang sight you can make your original sight windage adjustable. With a 30" sight radius, one quarter turn of the thumb screw moves your bullet 1/8 of an inch to the right or left on target at 25 yards. Comes with target eye disc. This is the sight stem and target eye disc only! Fits antique #2 tang sights.