Although good, a solid steel or aluminium pen is likely to provoke a negative response from the police. Try a simple dry or permanent marker and some simple kubotan techniques.
Waterproof Stainless Steel Silver Aluminium Metal Case Box Business ID Credit Card Holder Case Cover L09407
Aluminium Kitchen accessory MULTIMATIC by SieMatic
Industrial, tough intersecting with natural, outdoorsy
Aluminium woonveranda modern, uitbouw keuken, woonveranda | Flickr - Photo Sharing!
Aluminium Skirting board PLANO BF by PROFILITEC
LED aluminium table lamp TENUE by @ilide #design nicolò gessa
FRAME floor Free-standing aluminium frame with high-performance LED lights.
Pendant | Aileen Lampman. "Leaf and Tendril". Sterling silver, hanging from a sterling cable wire.