Inside a grater

No it isn’t a spelling mistake in the POTD title (for once).  This evening I decided to photograph the inside of the cheese grater.  Two version with and without cheese. 

For those interested in the technical aspects.  30sec exposure, F22.  Extension tube to enable me to focus this close in.  Camera lying on its back, with the cheese grater balanced on the lens hood!

Cheese Grater