The industry standard Rol-Air® is the choice of professionals. Flares soft copper, aluminum and brass tubing. The faceted, hard chrome coated cone rolls out perfect 37° flares above the die block, and then automatically burnishes the flare face while maintaining the original wall thickness at the base of flare. New slip-on yoke permits use in tight quarters. Satin chrome and black finish. Flares tube sizes:3/16", 1/4", 5/16", 3/8", 1/2", & 5/8" O.D. tubing. Not recommended for stainless steel. Meets AS4330 (formally MS33584) aviation tube flaring standards.