Tylo Knob Privacy Door Lock with New Chassis with RCAL Latch and RCS Strike Bright Brass Finish Kwikset is the leading residential lock manufacturer, making homeowners feel safe since 1946..Tylo Knob Privacy Door Lock with New Chassis with RCAL Latch and RCS Strike Bright Brass Finish Kwikset works hard to understand the world you live in, so that we can do everything we can to protect it.