Comment: Uberti 1866/1873 Lightened Spring Kit and Hardened Screw Kit. Included in the kit is a lightened mainspring, Lightened Action Springs and Lever Safety Spring. While the screws include a hardened Lever screw, Sideplate Screw, 2 Action Spring Screws and a Mainspring Screw. If buying for an 1866 it will be less $7 as you do not require the Sideplate screw. The Cowboy Guns and Gear Lightened Main Spring has been designed for the competitive shooter as a reliable alternative to the standard factory main spring. The Light main spring will suit a full race ready rifle and will work well with all primers including Federal with a hammer wieght of 2.5-4lb with the balance of the main spring screws. The lightened Action Springs will not only lightened the action but also reduce the wearing on the cams caused by the factory springs. The lightened Lever Safety spring reduces the need to pull the lever up hard before pulling the trigger while the hardened screw kit will stop the damaged heads that are common with the standard factory screws. Price does not include postage or insurance