Beginners Polo

Nope, all of you! ;) thanks for helping though! Hugo came closest. That's a way actually.
Still would like to know from Hope, since she said she bought them off ebay and it sounded quite like what I want.

"security torx button head screw" ?

(can't stop guessing)

great ideas, especially the last one, on www.bikehacks.com/bikehacks/2010/03/eight-solutions-to-fight-bicycle-part-theft.html