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2. Technical drawing tool - Wikipedia

   en.wikipedia.org/wiki/Technical_drawing_tool

   One form has two straight legs joined by a hinge; one leg has a sharp pivot point and the other has a holder for a technical pen or pencil. Another form, the beam compass, has the pivot point and pen holder joined by a trammel bar, useful when drawing very large radius arcs. Often a circle template is used instead of a compass when predefined ...

3. T-square - Wikipedia

   en.wikipedia.org/wiki/T-square

   T-squares are also used in various industries, such as construction. For example, drywall T-squares are typically made of aluminum and have a 48-inch-long (120 cm) tongue, allowing them to be used for measuring and cutting drywall.

4. Mechanical pencil - Wikipedia

   en.wikipedia.org/wiki/Mechanical_pencil

   A typical construction of a ratchet-based mechanical pencil. A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈ l ɛ d /. The lead, often made of graphite, is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from ...

5. Compass (drawing tool) - Wikipedia

   en.wikipedia.org/wiki/Compass_(drawing_tool)

   Compasses are usually made of metal or plastic, and consist of two "legs" connected by a hinge which can be adjusted to allow changing of the radius of the circle drawn. . Typically one leg has a spike at its end for anchoring, and the other leg holds a drawing tool, such as a pencil, a short length of just pencil lead or sometimes a

6. Technical pen - Wikipedia

   en.wikipedia.org/wiki/Technical_pen

   The construction and number of parts varied depending on the company, and the parts were not cross-compatible in most cases. Some later designs (like the Staedtler MarsMatic700) had specially designed channels to allow better air flow in between the wall of the external grip and the point assembly.

7. Multi-tool - Wikipedia

   en.wikipedia.org/wiki/Multi-tool

   A multi-tool (or multitool) is a hand tool that combines several individual functions in a single unit. The smallest are credit-card or key sized units designed for carrying in a wallet or on a keyring, but others are designed to be carried in a trouser pocket or belt-mounted pouch.