harbour freight is the dollar general of tools.
so, with that in mind...
i buy their stuff all the time, knowing full and well the life expectancy is sketchy.
some stuff i thought would go south fast has endured years of constant abuse, some has not.
im sure whatever you were gonna use them for, they would be adequate, for a while at least.
i have one of the pnuematics on my gate, and its been there 3 years, no problems.
hope that helped.