If you're looking to keep it as simple as possible, go with hangs.
I do hanging from a door frame/pullup bar, and then loop a towel over the bar and hang from that. The thicker the towel, the harder it is to grip.
You can also do one-arm variations, although I can't say I'm at that point yet.
I'm not one for hyperbole, but I'm pretty sure that after six months of this routine, you'll be able to beat a gorilla in an arm wrestle just by crushing his hand.
I do hanging from a door frame/pullup bar, and then loop a towel over the bar and hang from that. The thicker the towel, the harder it is to grip.
You can also do one-arm variations, although I can't say I'm at that point yet.
I'm not one for hyperbole, but I'm pretty sure that after six months of this routine, you'll be able to beat a gorilla in an arm wrestle just by crushing his hand.