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The Pilot Dr. Grip Center of Gravity, made with a grip so good that it won an award from the Arthritis Foundation, the Lamy 2000, with its brushed fiberglass-and-stainless steel body, the Rotring 800, with its hexagonal body and the Uniball Kuri Toga, with its auto-rotating mechanism, are some examp


The original inventor of the mechanical pencil is up for debate. There are documented references to a lead-holding pencil as early as 1565, and the earliest known version of what is now considered the modern mechanical pencil was found in 1791. There are also many patents for different versions.


A typical No. 2 pencil is 7.5 inches long with a 6.75-inch wooden shaft. Most No. 2 pencils are made from cedar with a hexagonal shaft. The lead is a mixture of graphite, clay and wax.


Although no documents state the motivation for the pencil's invention, it was likely first created as an alternative to pens. According to Pencils.com, the first known pencils were developed shortly after the discovery of a graphite deposit in Borrowdale, England, in 1564.


The length of a standard number 2 pencil is 7.5 inches, and the pencil has a diameter of about 7 millimeters. Golf, or library, pencils are typically about 3.5 inches long. The most common material used for a pencil's core is graphite.


The density of a pencil varies based on the type of pencil, but it can be found by measuring the pencil's mass, preferably in grams, and then dividing the mass by the volume. The formula for density is density = mass/volume.


A mechanic is most often a trained service professional who inspects, maintains and repairs cars and light trucks. A licensed mechanic may specialize in a number of other fields.


Pencil makers in the United States often use a number scale in which higher numbers mean harder graphite, while manufacturers in other countries often use a letter scale that grades based on hardness, blackness and ability to sharpen. However, these marks vary as manufacturers employ their own gradi


For teenagers, larger pencil cases or cases with straps to hold in notebooks or calculators conveniently keep school items together. CoolPencilCases.com and Polyvore.com are two websites that feature diverse collections of teen-friendly pencil cases.


A simple and effective way to sharpen a pencil is to use a hand-held pencil sharpener. Insert a pencil into the pencil sharpener. Firmly grasp the pencil sharpener and turn the pencil clockwise until it is sharp enough, periodically checking the pencil's sharpness.