The 6-position dimpling tool is designed to allow you to easily dimple your own barrel. The 6 different, laser-marked spacing sets allow for a variety of gas blocks to be used.
Spacing is to the center of the holes: .400, .420, .450, .460, .470, and .500. Made from steel heat treated material. Comes with:(1) Alignment set screw(1) Non-marring set screw