This is more of an issue on hydraulic systems. For air use it would be fine. My vote, however, is for black sch 40 pipe. This will last a lifetime, especially with a proper air drier and oiling system.
We use the self retracting knives at my overly safety concious work. They are definitely the nicest safety knives I've used. Blade changes are simple and toolless and they are well built. The gold series only look nicer.
Something like the regulator below would be fine. You may be just fine without it, but it's cheap insurance in my mind.
https://www1.mscdirect.com/cgi/NNSRIT2?PMAKA=62383617&PMPXNO=17992619&cm_re=ItemDetail-_-ResultListing-_-SearchResults
If the filter is only rated at 140 psi, running air through it at 175 psi could possibly damage the filter and lead to debris downstream, which could in turn damage air tools. I personally wouldn't risk it. Like I said, you won't miss the extra air pressure anyway.
Does anyone know if this is a set of long and a set of standard length or two of the same sets. It's hard to tell from the description. I'm looking at these to upgrade/expand my small craftsman rp set.
I'm going to get flamed for saying it, but I recommend the Craftsman evolve sets from Sears. At $10 a set they are a good bargain. I have a set in sae at work that I use often and they still look like they did when I bought them. I have already hung on the 3/8 with my long handled 3/8 ratchet...
I have people at work that I know never to lend tools to. Most of the guys think that a ratchet should double as a hammer and a pry bar. When production employees start asking to borrow tools, I know to ask some questions. Usually it's to fix something before anyone else realizes they broke it.
I'll second Fenix. In my opinion they can't be beat for the money. Not far from a streamlight or surefire as far as quality and function but at a fraction of the price. I'm not a fan of Mag. I feel that they are falling behind the others on technology. If I were you i would look at the AA...