For a more secure fit of your mount and scope, work with Leupold's 2-Piece Quick Release Base - Sako. The unique design allows for optimal placement and the most secure of fits. The base will create a stable platform from which to attach the rest of your accessories. You will find that the base is made from the highest grade metal for added durability and strength. This secure fit provides for minimal alignment adjustments, even during the most rigorous of events.