Phrases Offering and Refusing Help

I'm more than capable of handling this myself.

C1

Meaning

I can manage without help.

Example sentences

John: Need a hand with that heavy box?

Alice: I'm more than capable of handling this myself. Thanks for the offer though.

John: Okay, just let me know if you change your mind.

Alice: I appreciate the offer. But I'm more than capable of handling this myself.