Hi Everyone,
Upon my recent noodling I've come across some damaged coins, 2 I think are
PMD and 1 possible a die crack? I would like any feedback if possible as this is a new hobby and I'm picking it up as I go.
1972 - possible die crack?

1981 - Strange twisted but flat damage along rim?

1999 - I'm thinking pliers may have caused this.

Any advice whether I should keep these or throw them back would be appreciated. Thanks.