MIG Contact Tip, 0.045 in, Tweco® Style, Heavy Duty ORS NASCO Built in bumper reduces shock Built in bumper reduces shock when blade is retracted Rounded case fits your hand for comfort Graduations printed in fractions and decimal equivalents Positive toggle lock holds blade securely at any length Durable ABS case withstands rugged use on the job site Gas lenses provide a more efficient stream of shielding gas to the welding process The gas lens virtually eliminates turbulence in the gas shielding stream as it emerges from the nozzle Two piece construction Works with Best Welds® gas diffuser or equivalent OEM MIG guns Industry part number easily recognizable Durable and precise