The TruGlo TSX Pro Tool-Less 5 Pin Sight (Black) has a unique tool-less, stainless steel tube pin design for increased durability and brightness. Its aperture has a two inch inner diameter. Level is illuminated by luminescent tape. It has adjustable 2nd and 3rd axis level with two vertical bars and reversible bracket for greater vertical adjustability. It includes adjustable rheostat light to reduce unwanted pin glare. Adjustable for left and right handed shooters.