Well constructed brass material  and others with it , i remodel homes by trade so i as many know kwikset is very trustfull brand so i decided to use them for my family home remodel and doors replacement ,my kids are rough with doors so its paying its price , i used the passage locks on bathrooms only as it comes with a about 3inch long pin to open doors from outside through the pin hole in case it gets locked by accident ,
Hope it helps !!