Quite innocuous, everyday items can be used.
A couple of years ago security at Schiphol confiscated my Kensington cable because the eye in the end meant I could loop it and make a garotte.
Then the next trip they confiscated my RS232 cables "because they could be used to strangle someone" but left me the power cord for the computer "because it is part of the computer, so it is legitimate".
(1) trying to pull a kensington cable tight would be a superhuman task
(2) and the RS232 cables were part of my alarm clock?