I agree with Peter McBride about the first item. Yes, a slitting cutter 
for a Stanley 45 or 55 or other maker's clone.

For example, the Record 405:

http://www.marquis-kyle.com.au/405.pdf

Instructions are on page 11, and a picture of the item on page 21.


As to the other item, I have no clue. Looking forward to the reveal.

-- 

Peter Marquis-Kyle