🔍 Key Concepts

• Internal vs. external threads on pipes or fittings • Common hand tools used for cutting vs. cleaning threads • Sequence of operations: drilling, reaming, threading

💭 Think About

• Which tool is specifically designed to cut threads inside a hole or pipe, rather than on the outside of a rod? • Think about the typical order: first you drill the hole, then what tool actually forms the internal threads? • Which listed tool is used mainly to prepare or size a hole, not to create the threads themselves?

✅ Before You Answer

• Identify which tool is made with flutes and cutting edges for forming internal threads. • Separate tools used for external threading from those used for internal threading. • Confirm in your mind which tool is used before threading and which is used to create the threads.