Double ended boring bars with HSS

I own one of those double ended boring bars which use HSS. Not really sure how they are suppose to be used. But guessing

• The 90-degree end is for threading Operations
• The 45-degree end is for turning operations
• Most HSS bits are ground for standard threading operations.
• Big advantage over inserts is reduced chatter. Inserts bear forces at the furthest point on the tool.

Is my understanding correct?

Thanks in advance, Tom
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