The DNZ Freedom Reaper Picatinny Rail Scope Mount Cap will accommodate most of the 1-inch riflescope tubes on the market. The item will also fit the four-screw mount caps from DNZ products. This piece is designed for a snug and secure fit. You will also find that the cap is very easy to install with just a couple of steps. The construction is from heavy-duty metal allowing for maximum security. DNZ is a trusted industry name and that is because it provides durable pieces that perform.