Semi circle hole in wooden handle

[SocialEvil]

Hello, in the picture below, there is this metal thingi and its kinda not complete circle. i want to make a wooden handle with same hole in it, so i can stick it and turn the metal thingi clockwise. But all i can find in internet is how to make "the perfect round hole , perfect circle and so on"... Do you have ideas how i can do that?

P.S i am kinda of a wood newbie so.. be gentle.
Thanks

[verawood]

Welcome SE

[Lappa]

If I understand correctly, I would do it like this.

489673

1) drill the hole
2) shape a section of timber to make the flattened bottom
3) glue it into place.

[SocialEvil]

Thank you. I will try tonight when I come back from work.