How to use clutch pencil in a sentence? Find typical usage patterns (collocations)/phrases/context for "clutch pencil" and check conjugation/comparative form for "clutch pencil". Mastering all the usages of "clutch pencil" from sentence examples published by news publications.
A clutch pencil (or leadholder) tends to use thicker leads (2.0–5.6 mm) and generally holds only one piece of lead at a time. A typical clutch pencil is activated by pressing the eraser cap on the top, to open the jaws inside the tip and allow the lead to freely drop through from the barrel (or back into it when retracting). Because the lead falls out freely when the jaws are opened, its forward movement cannot be controlled except by external means. This can be easily done by keeping the tip of the pencil a few millimeters above a work surface or the palm of one's hand.
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Some clutch pencils do have mechanisms which incrementally advance the lead, such as the Alvin Tech-Matic leadholder, but these are not normally considered to be in the same category as most pencils with propelling mechanisms. Ratchet-based pencils are a variant of the clutch pencil, in which the lead is held in place by two or three small jaws inside a ring at the tip. The jaws are controlled by a button on the end or the side of the pencil. When the button is pushed, the jaws move forward and separate, allowing the lead to advance.
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The outer casing may be made of wood (like an ordinary pencil) and sharpened with a knife or pencil sharpener. Other types are covered in paper and sharpened by pulling a string to peel off the paper, needing no additional tools to remain functional. More recently, it has been produced in propelling form, essentially similar to a clutch pencil, this type in particular being associated with knee boards employed by NATO aircrew. Surfaces used with grease pencils include porcelain, glass, rock, polished stone, plastic, ceramics and other glazed, lacquered or polished surfaces, and metal, as well as the glossy paper that is used for photographic printing (particularly for contact sheets), x-rays, maps, and for marking edits on analog audio tape and film.
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