This will probably get deleted, most everything from anyone with any actual experience is getting deleted by the 'moderators' lately...I would think chains would only be appropriate for being in deep snowfall. My understanding is that chains don't hold up to pavement well unless they are extremely high quality (e.g., Pewag). And who wants the jarring ride? With 4x4 you just need good tires.
First off, Studded snow tires and even chains are ILLEGAL in most states and under most circumstances.
There are a few mountain passes that require chains, and all most everywhere else they are illegal.
I don't know anywhere studded snow tires are legal anymore.
http://www.lacledechain.com/ makes EXCELLENT tire chains, and some cables.
I use them not only in snow/ice, but for off road use, like mud cleats.
They make tire chains that will stand up to FARM USAGE, and that's saying something!
If you have a 4x4 with heavy lug tires, it's a bad idea to use chains, the chains simply fall into the lugs and do you little to no good.
Use a smoother tread, highway type tire with chains, and you will keep much more of the chain in contact with the road where it will do some good!
Remember, It's MUCH EASIER to chain up BEFORE you get stuck than to try and chain up afterwards!
Go slow, drive like you have some sense and realize you are driving on tires that are WAY out of balance,
And that there is lots of weight way far from center on your tires!
Don't use chains on a vehicle the fenders are close to the tires!
As you drive faster, the centrifugal force will expand the chains and they WILL EAT YOUR FENDERS!
If you are only a 'Little' stuck, remember, you can just throw the chains down on the ground and get traction on them, then pick them back up once you are 'Un-Stuck'...
You don't have to 'Chain Up' for every little slick spot!