AT AMAZON, Columbia River Knife and Tool TPENAK Elishewitz Tao Pen Tactical Pen. I got one of these pens a while back and recently got pulled over at the airport for something suspicious in my luggage. I thought for sure they were going to confiscate my pen but the “suspicious” item was a half bottle of water I had forgotten to throw out. This pen has traveled with me everywhere and it has never been confiscated yet. It’s pretty amazing.