DESIGNED FOR THE MOST COMMON TUBINGS IN HVAC AND PLUMBING. Perfect for mini splits and ductless A/C copper and aluminum tubes. Keeps the tubing thickness for high pressure refrigerant fluids such as R410A, R22, etc. Developed and recommended for soft and hard copper, SPIN SWAGING TOOLS are the natural evolution of HVAC-R swaging tools. Swaging Tool Drill Bit 1/4” 3/8” 1/2” 5/8” 3/4” 7/8” Bits ((Choose your Size)). 1 Piece Swaging Tools Way more surface of contact between the flare and the Valve. Up to 10x faster than the conventional tools: flares in 5 seconds! Steel Alloy HVAC Ready. Way more surface of contact between the flare and the Valve. 410a Compatible / Avoid Cracks and Leaks / Hat by Friction / Fits into any Drill*.