Uniweld 70004 Heavy Duty Flare/Burnish Tool Used for 45 Degree flaring of 3/16in, 1/4in, 5/16in, 3/8in, 1/2in and 5/8in O.D. soft copper, aluminum and brass tubing Has a specially designed burnishing cone with a hard chrome finish that automatically burnishes flare face Swivel-type, self-centering yoke and heat treated dies that grip tubing without scoring