With an extremely quiet design, the TruGlo Pendulum One-Pin Sight is a choice archery sight for treestand hunters. The unique Pendulum Adjustment System automatically compensates for distances of up to 35 yds. Constructed with lightweight, durable CNC-machined aluminum for years of dependable service. Can be locked in place for ground shooting. Extra-long, protected, wrapped fiber. Pendulum adjustment for windage and elevation. High-visibility level. Includes high-intensity violet LED light with adjustable rheostat. 1.8" diameter aperture. .019" pin. For use with left- or right-hand bows.