Nightforce Ultralite rings are CNC machined from 7075-T6 Aluminum and feature a titanium crossbolt and jaws. This combination results in a set of rings that is 50% lighter than steel and by most standards, more durable and reliable. Serious shooters choose Nightforce accessories because they know that their success at the range demands the most state of the art equipment and precision craftsmanship for which Nightforce has become the standard. NotesMounting hardware included4-hole model