Lightens & Smooths Felt Trigger Pull
Kit contains a medium weight hammer spring that reduces tension for easier trigger pull, plus medium and light sear/bolt springs; lets you select the best combination for a reliable trigger release.
Big Book Catalog, Issue:70, Page:238
SPECS: Spring steel. For Colt Single Action and clones. Sold as
a pack of three springs. Gunsmith fitting may be required on 3rd
Generation Colts and various clones.