Allstar Performance ALL11015 Double Flare Tool 45 Deg Flaring Tool – Professional – 45 Degree Double Flares – 3/16 to 1/2 in Tubing – Steel – Kit. Allstar Performance – DNLF_ALL11015. Flaring Tool – Professional – 45 Degree Double Flares – 3/16 to 1/2 in Tubing – Steel – Kit.