Check the listing for details. Ithaca 37 Mainspring Installation & Removal Gunsmith Tool - All Gauges. Listed at 24.99 USD. This is an Ithaca model 37 mainspring installation tool that we made. It is steel and works with both long and short tang model 37s. Slide it over the tang, lock in place with the top screw, tap the stop pin out or in.

$17.49
$24.99