Features windage and elevation knobs with click detents in minute and 1⁄4 minute graduations.
Big Book Catalog, Issue:66, Page:283
SPECS: Machined aluminum body, steel knobs. Matte black finish. Adjusts from 1.06" (2.6cm) to 1.56" (3.9cm) above bore line. Includes 7⁄8" (22mm) target disc w/.040" (1mm) aperture. Wt. 4 oz. (113g). Fits Williams Foolproof Bases. For .22RF target rifles.