The Leupold 1" QR Medium Extension Ring Set #49976 in matte black is designed specifically for hunting rifles, with a gauge/caliber of .30-06 Springfield. Made of steel, this scope ring set includes a medium height for optimal performance. The extension ring set is designed for easy mounting on a rail, making it a convenient accessory for enhancing your hunting experience with a reliable and high-quality scope mount. Leupold is a reputable brand known for their precision optics and durable mounts, making this product a valuable addition to any hunter's gear.