Fill in the blank (_) in the following sentence from the following choices.
Sentence: The tool is not capable of turning the bolt without twisting because the _ is strong.

Choice 1: The tool is not capable of turning the bolt without twisting because the tool is strong.
Choice 2: The tool is not capable of turning the bolt without twisting because the bolt is strong.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.