I dunno .... i was a carpenduh for many years. Lol... they used to call us chislers back in the day, for very good reason, but that's another story.

A chisel is a special purpose cutting tool with a hollow ground razor sharp edge for cutting wood. Cold chisels are for stone and metal. Air chisels are like cold chisels and made for the purpose.

No offense intended, but using a screwdriver as a chisel is like using a rock instead of a hammer to pound nails.It can be done but it's not the best idea. Better to use a hammer.

On that note ... you want to make sure to keep your hammer heads ground flat. They tend to get rounded over with use and go dinging off to the side. The nail you end up striking ends up being your thumbnail and that hurts like hell. Ever get a blueberry under your thumbnail ? It takes forever to go away. The best way i've found to get rid of blueberries is to use a small drill. You drill through the thumbnail and it pops the blood blister underneath. You can use a small finish nail that's been heated up cherry red and burn a hole through the nail to the blister underneath but that hurts real bad too.

* Remember * Always use safety glasses or a face shield when you're doing this kind of work.