Versatile, steel bases accept target front sights and external adjustment scopes from Redfield, Lyman, Unertl and others that require a 3/8' dovetail base. Contoured bottom radius provides a tight, solid fit to barrel, prevents side movement, and ensures base is aligned squarely with receiver. Does not fit Redfield external adjustment scopes. Specifications: - 1018 steel, blue, matte finish - 1-15/16' (3.5cm) long - 9/16' bottom radius - Hole spacings are .860' and .562' - Includes 6-48 screws Manufacturer: P&L Development Model: 841105325