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
Answered by: Carlisle Brass Expert
Date published: 2018-12-23