Bernard's Centerfire line of MIG welding consumables includes gas diffusers, contact tips, and nozzles. Requiring no tools to change, the Centerfire contact tips drop in the gas diffuser and are locked in place by tightening the nozzle. The company says the large-diameter tip bases and tapered seats boost electrical conductivity and heat transfer.

Bernard Welding Equipment, Beecher, Ill.
bernardwelds.com