We are actually in a large factory, we specialise in building timber frame panels that form the structure of houses, apartment blocks etc. We do have a very strict Health & Safety policy due to the nature of the job and believe me, our employees are very aware of the dangers as we have had a few nails in hands, through fingers but god forbid no eye injurys. I just wasnt sure if there were any guns/nails on the market that would penetrate a knot. Thanks for the reply, all info is greatly appreciated.
