Ground clamps.

[Artisan]

Troven, I have never grounded both pieces, I believe that once you make the smallest of a weld, you have ajoined the two anywho. Today I didn't ground anything...I simply grounded to the meatl table and the work pieces touched it...

 

[sandman2234]

How about these? It's built into a set of vise grips.

https://weldingsupply.securesites.com/cgi-bin/enlarge.pl?main/StrongHand/GP950.gif:Ground+Hog+Pliers

I use something similar to this... as my brass ground clamp spring usually doesn't clamp very good, I keep a pair of vice grips handy to increase the pressure on the clamp. I probably have a couple of new ones in the box over on the shelf, but am too cheap to throw away one that I can still make work.
David from jax

 

[dstig1]

What Artisan said. If you have a situation where it becomes a problem, just make sure you ground the piece that you want to start your arc on. After you start, you are good to go.

 

[SPYDERLK]

Im going to make one with this:
IRWIN VISE-GRIP 12LC The Original Large Jaw Locking Pliers - 12