Carbide Glass Breaker

[Surgicalcric]

The S&W is a spring loaded window punch.

If you are trying to make one that will break the Safety Glass used in windshields you may want to rethink this venture. Windshield glass is lexan sandwiched between two pieces of tempered glass. It is designed to spider, but not shatter. If access is required thru the windshield I more often than not will use a Glass-Master windshield saw , a reciprocating saw, or or an axe.

The folder/window-punch that S&W makes, while a good punch is a horrible knife. The blade dulls fast and is very difficult to sharpen given its shape. The handle is a plastic substance that is not very durable and is not slip resistance at all which causes the knife to slip easily in the hand when trying to cut thru webbing and cloth or other tough material.

On the design side of hings, something with an actuation button similar to a stilletto knife would be an improvement. The lever/slide action of the S&W is somewhat of a pain as the polycarb handle begins to wear.

To be honest, I have not used mine in some time because its a pain in the ass to hold onto. Seems like its worn out as soon as its worn in.

HTH.

James D