A superb tough, durable multi-function pen. Aircraft grade aluminium body with a matt Titanium finish. Takes a standard Parker refill which are cheap and widely available. Features a super hard tungsten tip which can be used to defend yourself and used to break car window glass if trapped in a car. The clip is steel and very strong which stops it falling out of your shirt pocket. I have used this model for more than 10 years in my handyman business and it still works fine. Limited number available.