“3 sizes of flat metal pieces with punched hooks on one side, probably stainless steel. Found in a kitchen drawer.”
Answer: "They are turkey plates. You stuff your turkey, then put the plate in at the opening. The cutouts are to catch the skin, which holds the plate in place. My mother got a set for her wedding in 1957, and we used them every Thanksgiving."
#2 Actually these are for eating crab of lobster. Crush the scale and empty them wth the picks.
#15 It is a tool to press and crush garlic. For Americans among us: garlic is not a powder :-)
#2 is both. They are sold as each.
#2 is for nuts. We had a set like that. Cracker with multiple picks, and a bowl for nuts with a holder in the middle for the tools. Similar to this one https://www.pinterest.com/pin/157837161928043131/
#15 would be sh#tty when used as a garlic crusher..
To clarify. Garlic crushers have holes for the garlic to squeeze out. This tool is enclosed, which would make it very hard to remove the crushed garlic.
It's too small to use for BBQ cooking and also beating rugs .. it's definitely used for saving scrap soap and swished around to make soapy dish water .
Also to put soap in them and then beat things with it (or people). Would spare the sock