Burris Signature Zee Rings set the industry standard for quality. They have a reputation for reliable performance in any weather or shooting circumstance. Proven design has stood the test of time. Solid steel rings, ideal for hunting, are available for all types of optics and bases. Pos-Align Inserts offer tremendous gripping power and durability and will not damage the scope finish. Burris 420591 Signature Zee Rings Matte Black 34mm Medium.