For maximum accessibility to the magazine or breech area of your rifle, STD 2-Piece Bases are worth a look. Fluted for a "custom" look, these bases are also ideal if you're after greater flexibility when it comes to mounting options for your bolt action rifle. Reversible bases are available for many actions, accommodating a variety of scopes and action lengths. Additionally, STD 2-Piece Bases fit right-hand and left-hand actions. Long Range STD mounts provide 1/4 degree of built-in elevation. Manufactures Website Address www.leupold.com Warranty Information Full lifetime guarantee. If any product has defects in materials or workmanship, Leupold will, at their option, repair or replace it free. Even if you are not the original owner.