Its been a very long time since I posted here
I have some discs that were given to me with various size holes in, some round some oval with indexing position holes all round them and I am ashamed to say I dont know what they are for, I feel I should know but cant quite remember. Happens when you get old.
Anyway here is a picture, hope some of you know the answer.
I have some discs that were given to me with various size holes in, some round some oval with indexing position holes all round them and I am ashamed to say I dont know what they are for, I feel I should know but cant quite remember. Happens when you get old.
Anyway here is a picture, hope some of you know the answer.
![rh00nn.jpg](https://proxy.imagearchive.com/4b5/4b5733d38f35d5c66be1dfa17f3d793c.jpg)