This ring wrench from Leupold tools is exactly what you need to install mounting rings in your firearm without risking damage to your rifle or scope. Designed to fit 30mm or 1-inch rings, this ring wrench is one tool you should always keep nearby. Like all Leupold tools and accessories, the Leupold Alumina 50 Foot Parallax Adapter is designed for quality and utility. This ring wrench is made from hard, injection-molded plastic to ensure durability, and it is small enough to conveniently fit in your pocket or gun bag.