The KNS Assortment of 7 precision front sight posts are steel with a black oxide finish. The kit includes three square posts with widths of 0.034, 0.052, and 0.072; three round dot posts with diameters of 0.034, 0.052, and 0.072; and one V-notch post with inverted V post (point up) on the opposite side.Kit IncludesThree square posts, widths: .034, .052, .072Three round dot posts, diameters: .034, .052, .072One V-notch with inverted V (point up) on the opposite side