Allows for a 2 ½ to 3 Pound trigger pull for all new Model Large Frame Single Action Blackhawks, Super Blackhawks, and Vaqueros. Make Ruger Single Actions feel more like Colt Single Action. When on Halfcock, open the loading gate- chambers line up with the loading gate for ease of operation, spin the cylinder & hear the pawl sing. On Hammer draw you can hear and feel 3 postive clicks. Wolff Spring Kit includes 3 different reduced power hammer springs, (17lbs, 18lbs, and 19lbs), a reduced power trigger spring, and 1 extra power cylinder latch pin spring (minor modifications are required to some factory parts). Includes detailed instructions.