refrigeration flaring tools,hole flaring tools CT-500 Description 1) Insert tubing into adjustable of tube holding assembly. Position end of tubing approximately 1/8" above the surface of holder. 2) Tighten clamp screw approximately 1/2 to 3/4 of a turn beyond free travel position to secure tubing. 3) Be certain flaring cone surface is oiled. Slip yoke over tube holding assembly centerring on tubing. Twist yoke clockwise to lock in position. Turn yoke handle clockwise to flare.