The pen is weighty because it’s made from CNC machined 6061 aircraft aluminum. The clip on is very sturdy and didn’t budge whether it was attached to my pants pocket or the lapel on my jacket. As I would get out of my car or walk down the hallway of my hotel or in a store, I actually carried it in my right hand for ready use.
Because of it’s design, this little pen can break bones in a hand and cause great pain in the neck of face regions of the body.
In a water emergency where you might be trapped in a car being washed down a torrential rain pathway, this little tool is ideal for breaking glass. The only thing you must remember is to hit the glass at the four corners versus in the middle of the glass window due to the lamination of the glass design.
All windshields have three layers. You have a glass in the inside and a another glass in the outside. Both of these glass sandwich a strong vinyl called PVB (poly Vinyl butry), in language terms it’s a strong lamination. When impact accrues in the outer glass, the lamination is intact to hold the break together, resulting in a crack. Tempered glass, when made is in a state of compression. It’s made in very hot temperatures then it’s rapidly cooled this is why when it breaks it’s in pieces, which is called dicing. Tempered glass can only be found in your side and back glass. The purpose for temped glass is for safety evacuation in case of a emergency where the doors won’t open and the only way out is through the window, temper glass makes it easier to break in such cases. Now these days more and more luxury cars are coming out with laminated side window, but only the two front side window will be laminated for instance the Mercedes Benz S500. So the bottom line is YES the front windshield is laminated by law according to FMVSS (Federal Motor vehicle Safety Standard).
This great explanation was given to us by Yahoo Answers.
Check out the safety procedures for exiting a sinking car tn this video.
CONTINUE ON NEXT PAGE[nextpagelink][/nextpagelink]