Designed specifically for compound bows. Constructed of aircraft aluminum and weighs less than the top selling carbon bar sight. A superior InchWindage Dovetail Guide System Inch replaces inferior twin-dowel guide systems. Features the InchVTS Inch (Variable Tension System) providing an adjustment where the archer personally chooses a desired elevation travel tension setting. Provides 2.875 Inch of elevation adjustment. 6 Inch or 9 Inch extension features the Mathews Harmonic Damper.