HIVIZ front sights are machined from solid steel and feature fiber optic LitePipe inserts for increased visibility and faster sight acquisition in all conditions. The Lite Pipe is overmolded with a clear resin for increased durability. Designed for Smith & Wesson 617 revolvers with pinned front sights. Notes:Height measurement is from the top of the sight blade to the bottom, not including the dovetail portion of the sightWill also fit J-Frames with HIVIZ sights from the factory, this sight will work for guns that are shooting high from the factory.Sight will need to be drilled for crosspin to ensure fit.