Burris solid steel rings ensure accuracy and provide an extra measure of confidence and peace of mind. Zee Rings (Weaver Style) are machined from a solid block of steel to exacting tolerance, and each top and bottom are matched for strength and fit. These rings are designed to handle any rifle and any recoil from rimfires to magnum calibers.These weaver-style rings are solid steel, so you can rely on their accuracy. Features: Machined to exact tolerance Top and bottom matched for strength and fit Handles recoil of any rifle