No tools required to replace tip or nozzle"Drop-In" tip with no threads means quick change after burnback, reducing down timeLarge diameter tip base and tapered seat provide better electrical conductivity and heat transferSpatter shield within nozzle protects diffuser and gives smoother, less turbulent gas flowSolid, concentric relationship between tip and nozzle keeps tip centered even after hard use... and abuseThreaded nozzle holds tip fixed at 1/8" or 1/4" recess, flush, or 1/8" stick outCompatible with all standard air-cooled Bernard® gunsComplete family of tips and nozzles is available to meet most of your welding needs