Replacement hammer allows for a lower profile wide spur. Hammer is best used with a Power Custom trigger, as factory triggers will require modification. Using the Power Custom Blackhawk trigger and a Wolff reduced power spring kit , the trigger pull will be around 2-1/4 lbs and 3 to 3-1/4 lbs with the factory springs. Requires minor modification to the transfer bar to allow the gate to be opened when on half cock. The rear of the hammer radius is larger than the Vaquero, Blackhawk Hammers.