BKL 167 1" LONG TRI-MOUNT DOVETAIL RISER MOUNT - The Length of this riser block matches BKL models 263 and 301; The additional 0.68" in height gives the target shooter a more heads up shooting position NEW DESIGN - New design of the Tri-Mount Dovetail Riser Mount allows for additional dovetail mounting points on each side; Model 167 mounts to 3/8" or 11mm dovetail AUTO-CENTERING TECHNOLOGY - Patented Auto-Centering technology solves the problems created by varying mounting rail widths; Clamping Legs move equally as the clamping screws are tightened ROBUST AND DURABLE - BKL-167 Tri-Mount Dovetail Riser Mount is manufactured from aircraft-grade aluminum alloy on state of the art machinery in Texas and finished in tough Matte Black paint for years of good looks and dependable service TECHNICAL SPECS - Item: BKL-167-MB; Riser Height Adds: 0.68"; Overall Height: 0.76"; Overall Length: 1"; Clamp Length: 1"; Weight: 2.1 oz; This item sold as a set