This Trigger and Hammer Kit offers a 2-1/2 to 3 lb trigger pull for all New Model Large Frame Single Action Blackhawks, Super Blackhawks and Vaqueros. When on half-cock and the loading gate is opened the chambers line up for no fumble reloading. A Wolff Spring Kit is included in the kit with three different reduced power hammer springs (17 lbs, 18 lbs and 19 lbs), a reduced power trigger spring and 1 extra power cylinder latch pin spring. Includes detailed instructions. Minor modifications are required to some factory parts, gunsmith installation is recommended.