Carlisle Brass Victorian Cupboard Knob Polished Chrome 42mm (7858P)

Hi Jc2bad, thank you for your enquiry. These are a one piece cupboard knob that are fixed through from the back of the cupboard/drawer with an M4 bolt, not a screw on rose. You would be looking for a mortice knob if you are looking for internal door knobs. I hope this helps answer your question, many thanks