Lincoln VIKING 2x4C Series Auto Darkening Lens with Digital Controls, Variable Shade 5, 8 13 Gold KP5561 2 Lens Color:Blue Green capacity Gun adapters provide superior Select Your Head:WITH STEEL WHEEL HEAD 3900SWH capacity Gun adapters provide superior electrical connections reducing voltage drops and simplifying connections Wire drive circuit board is encapsulated for maximum protection from the elements SUPERIOR PROCESS CONTROL Digital preset for voltage and wire feed speed Save repeated procedures in up to four user memories Process limits can be set and passcode secured Displays actual voltage and current while welding SAFETY WITH EVERY PROCESS Single wire drive model feeders can be ordered with an electrically isolated stud for arc gouging operations Dual wire drive model can be ordered with a Power Path contactor that electrically isolates the non active wire drive and gun User selectable wire retract function physically retracts the wire back into the nozzle to prevent operator injury ADVANCED MaxTrac WIRE DRIVE DESIGN Rugged cast aluminum feed plate protects wire and ensures consistent wire feeding Patented tool less drive rolls make adjustments and maintenance quick and easy Patented tool less split wire guides ensure uninterrupted feed and prevents birdnesting MODULAR DESIGN PROVIDES FLEXIBILITY OF CONFIGURATIONS Configure for single Lincoln OEM ROCKER SWITCH Replaceable CR1025 Batteries extend the overall usage life of the lens cartridge 8 13 for seamless process and amperage changes plus a cutting shade option