Kwikset82247-15 Adjustable Radius Deadlatch Brass Finish

Does this work on 5” backseat?

Will this work for a 3-3/4 inch backset?

Best to buy from hardware store. No specs for spindle size. Appears to be 3 different sizes. Why no specifications?

Will this work with a 8mm spindle door knob. I need something that will work with that size spindle that goes from onknob to the other threw the door.