Designed specifically for Olympic style recurve bows. Constructed of aircraft aluminum and weighs less than the top selling carbon bar sight. A superior âWindage Dovetail Guide Systemâ replaces inferior twin-dowel guide systems. Features the âVTSâ (Variable Tension System) providing an adjustment where the archer personally chooses a desired elevation travel tension setting. Provides 4.375â of elevation adjustment and a 9â extension bar.