PROCURU1/2-Inch PushFit Elbow 90-Degree - Push-to-Connect Plumbing Fitting for Copper, PEX, CPVC, Lead Free Certified (1/2", 10-Pack)

Will this take a 1/2in od pipe with a. 3/8 id

Same diameter as sharkbite? can this be used with pex?

These elbows look kind of tight on space - how would you attach it to a 2 x 4, for a shower head?

I use a lot of shark bite fittings how do these compare? I have never had a shark bite failure. So I'm a little reluctant trying a new brand