Features of PWT's Auxiliary and Trailing Shields
 
Only one source of gas required
Electrode extensions as long as 1.5 inches (38 mm) are practicable
No need for a protective chamber when welding titanium
Several distinct gas paths built into one unit
Secondary system(s) acts as a barrier to the critical primary system, due to gas flow shear turbulence principles, protecting the weld better
Sleek, extra-long, and curved units available as options