How to Remove Pin Mechanism from Back of Brooches?

by Carol Super.

I want to repurpose brooches into pendants.

I want to take the locking mechanisms off completely.

I have read that one of the best ways to remove the locking parts is to use an end cutter / nipper / nail puller tool.

Can you recommend one, or can you tell me what size I should get? Thanks very much.

Carol Super