Porcelain Pull Knob with embedded threaded insert.
Screw is installed from the back.
Available in 2 inch diameter (D) x 1-3/4 inch Projection (P) (image 1),
1-3/4 inch D x 1-1/2 inch P (image 2),
1-1/2 inch D x 1-1/4 inch P (image 3),
1-1/4 inch D x 1 inch P (image 4) or
1 inch D x 7/8 inch P (image 5).