What size Cable Clamp for junction box

Hello. I am adding some junction boxes in my basement. The metal boxes have a 1/2" hole and also a 1" hole on opposite sides. For the 1" hole I had thought that a 1" cable clamp would work. I ordered a few and to my surprise, the diameter is just a tad to big. Do you know if there is a cable clamp that will work with a 1" hole?

Thank you.