Kwikset is the leading residential lock manufacturer, making homeowners feel safe since 1946. One Sided Turn Round Deadbolt with 2-3/8 Latch and SCS Strike with New Chassis Matte Black Finish One Sided Turn Round Deadbolt with 2-3/8 Latch and SCS Strike with New Chassis Matte Black Finish. Kwikset works hard to understand the world you live in, so that we can do everything we can to protect it. Our interior and exterior door products provide customers with the quality, technology, durability and style they want while providing the highest level of security.