Crooked Horn Sidekick Rangefinder Holster For maximum versatility, the Sidekick can be used with all Crooked Horn binocular systems. Attaches to the Bino System quick and easily Detachable buckle secures your rangefinder to the elastic strap to prevent drops Elastic cord secures to the rangefinder eyepiece for extra protection Streamline design won't interfere with your draw and still keeps your rangefinder close at hand