K-05 penta socket (5 point socket, pentagonal socket)

I think this is for automotive applications but I'm not certain.

The hexagon has a width of 21mm (i.e. is for use with a 21mm spanner).

I've sketched the pentagon (included with the photos) to give the size (20mm) and also to indicate that there is a key in each face (and, yes, they are not symmetric).

The sleeve is quite badly scratched (as can be seen in the photos) but I think it's still fully functional.

For info on NZ Post Courier and Economy, see: https://www.nzpost.co.nz/about-us/single-bag-range

Pick up is from St Albans Avenue, Mount Eden, Auckland and I am relaxed about when the trade takes place.