Some parts of a Kwikset lock include a deadlatch, a round corner strike and a six-way core plain latch. All of these parts are available for replacement at Kwikset.com.
The deadlatch slides into the center of the door knob and the lockset. This piece comes in three different finishes.
The round corner strike sits flush against the door where the lock slides into the door. This strike comes in nine finish colors.
A six-way core plain latch is the part of the lock that moves the metal into and out of the lock. This part comes in three different sizes but only a single finish.