Features: Precision machined from a solid block of top grade billet aluminum Custom made to fit each type of firearm and align perfectly with your rifle's receiver No moving parts between the firearm and the scope 67% lighter than comparable 1-piece mounts with four times the threads and precision socket head cap screws for absolute strength and security Absorbs shock and withstands temperature extremes better than steel mounts at a fraction of the weight Mounts fits right hand firearms Outside to outside of rings is 4.17 inches 4-hole to hole spacing dimensions are 0.86, 3.88, 0.6 inches Same mount used on the weatherby magnum and weatherby vanguard Made in USA