Hi,
Ended up with this in a lot of reloading tools I purchased, I thought it might be Sinclair but looking at both of them it definitely is not. I was then thinking RCBS because the .224 pilot on it seems to be the same pilot as used on the RCBS flash hole deburr tool, but I can't find any information about RCBS having made this specific type of tool.
Possibly homemade?
Ended up with this in a lot of reloading tools I purchased, I thought it might be Sinclair but looking at both of them it definitely is not. I was then thinking RCBS because the .224 pilot on it seems to be the same pilot as used on the RCBS flash hole deburr tool, but I can't find any information about RCBS having made this specific type of tool.

Possibly homemade?