BKL 167 1" Long Tri-Mount Dovetail Riser Mount: is packed as a set. The Length of these riser blocks matches BKL models 263 and 301. The additional 0.68" in height gives the target shooter a more heads up shooting position. New design allows for additional dovetail mounting points on each side. The mount is manufactured from aircraft-grade aluminum alloy on state of the art machinery. Technical Specifications of BKL 167 Tri-Mount Dovetail Riser Mount: - Riser Height Adds: 0.68"; - Overall Height: 0.76"; - Overall Length: 1"; - Clamp Length: 1"; - Weight: 2.1 oz; - Additional Dovetail Mounting Points on each side; - This item sold as a set. BKL Technologies is the manufacturer of the largest selection of gun and airgun scope mounts in the U.S. Competition-grade scope mounting system includes scope mounts, scope rings, dovetail to weaver adaptors, and scope risers that utilize a quick-installing and self-aligning clamping system that fits both 11mm and 3/8" dovetails. BKL mounts are compatible with popular gun and airgun manufacturers. Try BKL, and discover why many shooters use no other mount.