I ordered this to get my ethernet cable through the wall of my house as neatly as possible. The bushing fits snugly into a 2" (51mm) hole I drilled with a Milwaukee Hole Dozer. There was a pleasant click as the inside made firm contact with the flagstone. Then slide the outer cover onto the mating piece - another nice click. The color of the grommet is off-white and will go beautifully with any beige or almond interior wall paint. Fairly durable too. I am completely satisfied with this item and am glad I have extra sockets should I need them for future projects .