Flare Angle: 37 Degree & 45 Degree. Flare Type: Single, Double, & Bubble 37° & 45°. Flare Tube Sizes: 3/16″ 1/4″ 5/16″ 3/8″. 37° & 45° Ultimate Versatility: Brake Line Flaring Tool Kit featuring dual rotating die heads for both 37° and 45° angles, this flare tool kit effortlessly creates single flares, bubble flares, and double flares.