What does this go to?

[cdelaney]

I purchased a large lot of casting and sizing equipment.
These plates where in the lot.
there are two sets of them.
There was a lyman 450 lube sizer with heater and this looks different.
about 1/2 inch thick
I did not get all of the items from the collection.
305487

[Land Owner]

It is difficult to tell - those do not appear to be 1/2" thick plates, which would be about the width across your fingernail, unless they are rimmed, and their thickness is "underneath" - not seen. They don't seem to cast 'enough' shadow.

Just a guess - they are similar to (but are not) Pat Marlin Docking Plates. If they are docking plates they require "keeper tabs", shaped like a non-diagonal "Z", spaced such that the plates are slid in and out as equipment attached is moved on and off of the reloading bench.

[MrWolf]

The pic with the tape measure does look like an Inline Fabrication dock plate but mine is black. I agree with Land Owner's comments.

[cdelaney]

I was wrong. The bigger plate is 3/4 inch thick and 6" x 6.5"
The smaller one is 3/8 x 4" x 4"
I am not sure they go together but they had shrink wrap to hold all of them together.