Thursday Morning Riddle

On a metalwork tool, I’m an uneven spot;
I’m a sharp prickly seed, like a Xanthium’s got;
I’m an Ironside actor; a wood puzzle knot;
And in Hamilton, I’m the one taking my shot!

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

2 Responses to “Thursday Morning Riddle”

  1. Asher Says:

    Burr

  2. Bill Says:

    BURR is correct. Way to go, Asher!

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