🔍 Key Concepts

• Flaring vs. swaging operations on copper tubing • How fittings are attached to copper tubing in plumbing/refrigeration systems • The function of tools named stretcher and spreader in general mechanics

💭 Think About

• When you install a fitting on copper tubing, what shape do you usually form at the tube end so the fitting and nut can hold pressure? • Which process changes the tube end to accept a fitting without actually lengthening the tube? • Which of these tools’ names describes expanding or reshaping the tube end versus just pushing things apart or pulling them longer?

✅ Before You Answer

• Identify which choice is specifically designed to shape or form the end of copper tubing for a connection • Eliminate any tools that mainly separate, push apart, or lengthen materials rather than form a seat for a fitting • Think about common HVAC/plumbing practice: which tool name do you hear when making pressure‑tight joints on copper tube with a nut and fitting?