Differences between HB pencils - Arts & Crafts Stack Exchange

Pencils seem to have different types: From what I've seen, there's a few types: HB 2HB B and so on. What's the difference between all the different pencils? When do I use one or the other?

12pcs/set, HB pencil, perfect for writing, drawing, sketching, doodling etc. 6.9 inch long pencil,suitable for people of all ages;Triangle shape of

12 Pack Professional HB Pencil Set Non-Toxic, Not Easy to Break, Writing Sketching Doodling Pencil with Colorful Cover, Triangle Penholder, with Mini

High quality pencil for writing, drawing and sketching.High break-resistance through special lead formulation and super-bonded lead.Sustainably

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Different types of pencils : r/coolguides

Differences between HB pencils - Arts & Crafts Stack Exchange

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Pro Art Pencil Multi Media Drawing Set 36pc Multi-media pencil set include 12 watercolor pencils, 12 colored pencils, 8 graphite pencils in grades 2H

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Differences between HB pencils - Arts & Crafts Stack Exchange

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