RIZEWRAP angled fiber holder increases light exposure to fiber optic Unique Pro bright pin design for increased durability and brightness Mid-bracket elevation adjustments Extra-long fiber optics for maximum brightness 2nd and 3rd axis adjustable level Threaded aperture accepts sunshade sold separately DDP or decreasing diameter pins uses smaller pins at greater distances Ambidextrous for right or left handed shooters New improved glow-in-the-dark shooter's ring now has enhanced green day glow Tru Touch soft feel technical coating Constructed of aircraft grade aluminum Pin diameter: 3 pins at .019" & 2 pins at .010"