Our brightest 1-pin archery sight. Extra, extra-long fiber wrapped in a non-glare housing. Aperature has a 1-3/4" inner diameter. Glow-in-the-dark shooter's ring helps center peep sight. Glow-in-the-dark yardage tape. CNC machined. Ultra-light and compact. Vertical adjustment allows it to fit virtually all bows. Adjustable with one hand. Bubble level. Available with TFO pin.