What is it?

[bcp]

When I was a little boy playing in the farm shop in the 1940's, there were a dozen or more things about this size and shape in one drawer of the toolbox. They were very lightweight, like aluminum or magnesium. Color was a very dull, flat gray. All sides were equally smooth. I think there were several sizes. Size was about one inch by two inches. I have never seen any since then. There was a recently deactivated air base in the area, so there was a lot of surplus stuff around. Tractors maintained were JD and Farmall, and various cars and trucks. Anyone have any ideas?

Thanks,

Bruce

 

[skyhook]

Could be steel clips that held shelving on them, the right hand part locks into the side frame and the flat part would hold the shelf.