Pencils, Carpenter´s Pencils
Pencils are all the same, aren't they? Nope! They are not.
Obvious differences such as the hardness of the lead are well known. This ranges in steps from B to HB to H, i.e. from "Black" = soft to "HardBlack" = medium to "Hard" = hard. Depending on what you use the pencils for, you will also achieve very different results.
Many of the marking pencils are therefore equipped ex works with universal leads (HB) or somewhat softer leads, as these write well or adhere well on a variety of materials.
The models themselves also differ - again depending on the area of application:
the classic clutch pencil, for example, is ideal for technical drawings, the deep-hole marker pencil, of course, for deep-hole marking ;) - But the other way round, the two would be rather difficult to use.
The type and design of carpenter's pencils are, of course, specialised for drawing on wood, usually have a square lead and are much longer than most other pencils.