No tools required to replace the tip or nozzle. "Drop-In" tip with no threads means quick change after burn-back, reducing downtime. Large diameter tip base and tapered seat provide better electrical conductivity and heat transfer. Spatter shield within nozzle protects diffuser and gives smoother, less turbulent gas flow. Solid, the concentric relationship between tip and nozzle keeps tip centred even after hard use... and abuse. Threaded nozzle holds tip fixed at 1/4" or 1/8" recess, flush, or 1/8" stick out. Compatible with all standard air-cooled Bernard guns.