http://www.weldmongerstore.com/tig-finger/
A popular tig welding technique for stainless steel is walking the cup.
But there are times when walking the cup is not practical because of limited access or when there are other pipes in the way.
And in certain situations, walking the cup can leave scratches on a machined surface that might not be permitted either by a drawing requirements or customer preference.
Thats when a Tig Finger® comes in handy.
It's like having a prop in your pocket that lets you prop right next to a hot weld without smoking your fingers.
Both Tig welding techniques are shown along with a shameless plug for my Tig Finger® product.
http://www.weldingtipsandtricks.com/tig-weld.html