Warne 1" PA CZ Rifle Scope Mounting Rings 16mm Dovetail Medium are designed to be the strongest, most durable Fixed Scope Rings system available. Typical steel RifleScope Rings in this class use only 2 screws per ring, have a narrower clamping band and in most cases only absorb recoil in the front ring. Maxima PA Scope rings utilize 4 T-15 Torx style socket cap screws for secure RifleScope optics mounting. The Maxima PA series fit Weaver style cross slot bases and incorporate a Warne square stainless steel recoil control key in both the front and rear Scope Mounting rings. his ensures a "no slip" positive recoil surface across the entire slot of the Rings Base and is capable of withstanding the heaviest of recoil. The Warne Maxima square recoil key also protects against swaging or peening of the base when used on softer or less durable materials. The Maxima PA rings band width is also substantially wider which offers more ring to scope clamping area to hold the RifleScope optics firmly in place.