Can I bring my iopener on an airplane?

I would not do it. Looks to much like a SAP (blackjack). Some of these Transportation Security Administration (TSA) agents seem to be mentally imbalanced by the power they have and lack any common sense. I saw them put a 90 year old woman through the wringer for having knitting needles. They patted her down. made her take her shoes and belt off, her wedding ring. her ear rings. They finally let her back into her wheel chair. Her parting words are not allowed on this site. Give them as little oportunity as you can.