Warne 34mm, PA, Low Matte RingsPermanently attaches to base or rail Square recoil control key for positive engagement of ring to base. Rings securely mount around scope using 4 Torx style T 15 socket cap screws. Count on 34mm low scope rings from Warne Scope Mounts to give you excellent sighting through a scope. Using a scope requires careful installation and sighting: The goal is to have the lines from the scope and barrel be as close and as parallel as possible within your range.