Lyman Series 17A Insert Set. These Rifle Parts by Lyman bring you a vast array of shooting options so that you can pick your preference and customize to your liking. This Lyman Insert Set for 17 Globe Sight contains two post-type inserts (.050 and .100 wide) one bead insert (.062) and five aperture-type inserts (One plastic insert with .120 hole and four steel inserts with .093 .102 .110 and .120 holes). Changing your sights on-the-go has neves been easier and now you have so many different options to choose from. Grab this Lyman Series 17A Target Sight Set and enjoy your next visit to the range. Package Contents: Lyman Series 17A Insert Set 3171086 Lyman Series 17A Insert Set 3171086