Swaging Punch Kit with 1/4" 5/16" 3/8" 1/2" & 5/8" O.D. Tubing Swaging Tool Set 5 pieces: 1/4", 5/16, 3/8", 1/2" and 5/8" A/C Refrigeration Tubing Tool CT-193 CT-193 Eliminates the need for couplings