The 7757M Warne Mountain Tech CZ-457 rifle rail adapter has a 15MOA cant and slips easily over the 11mm dovetail on the CZ model 457 rimfire rifle. Four self-centering steel set screws are included with your CZ-457 Picatinny rail adapter for fast easy installation. The angled 15MOA mount allows you to adjust your scope for longer-distance targets. The 15MOA mount is preferred by target shooters hunters and competition shooters for zeroing. The NATO STANAG-compatible CZ-457 mount has a Picatinny rail and Cantilever design to give more mounting space for more eye relief and allow for use on larger scopes. The Warne Mountain Tech rail adapter for CZ457 rimfire rifles is lightweight but also firm crafted from precision-machined 7075/T6 aluminum with an anodized hard-coat finish to help prevent rust and corrosion.