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en.wikipedia.org/wiki/Mechanical_pencil

In spite of the name, pencil leads do not contain the toxic chemical element lead, but are typically made with graphite and clay, or plastic polymers. Compared to standard pencils, mechanical pencils have a smaller range of marking types, though numerous variations exist. Most mechanical ...

www.staples.com/Mechanical-Pencil-Lead/cat_CL110203

Shop Pencil Lead and Lead Refills at Staples.com. Enjoy everyday low prices and get everything you need for a home office or business.

www.jetpens.com/blog/mechanical-pencil-lead-comparison/pt/887

Jul 12, 2016 ... With mechanical pencils, the right lead can make the difference between a forgettable writing experience and one bordering on sublime. Whether you're using a 40-cent Bic or a $400 Montblanc, it's the lead that determines how a pencil writes. When choosing your lead, the first thing to consider is the ...

www.officedepot.com/a/browse/mechanical-pencil-refills/N=5+4505

Make sure you never run out of lead again by stocking up on mechanical pencil lead. As soon as your existing pencils reach the end of their lead sticks, you can easily replace them for non-stop writing. No matter what type of mechanical pencils you own, there are corresponding lead refills to fit them. Choose high- strength ...

www.amazon.com/Mechanical-Pencil-Refills/b?ie=UTF8&node=1069814

Results 1 - 24 of 2656 ... Shop for Mechanical Pencil Refills in Office Products on Amazon.com.

www.amazon.com/Pentel-Mechanical-Pencil-Stein-C275-4B/dp/B008JF3RLC

Amazon.com : Pentel Mechanical Pencil Lead, Ain Stein, 0.5mm, 4B (C275-4B) : Office Products.

www.amazon.com/Mechanical-Pencil-Leads-0-9-mm/s?ie=UTF8&page=1&rh=n%3A1069814%2Cp_n_feature_keywords_two_browse-bin%3A5047888011

Results 1 - 24 of 139 ... Online shopping from a great selection at Office Products Store.

www.amazon.com/Pentel-Hi-Polymer-Refills-Pieces-C25BPHB3-K6/dp/B001B0D9QK

Amazon.com : Pentel Super Hi-Polymer Lead Refills, 0.5 mm, 90 Pieces ( C25BPHB3-K6) : Mechanical Pencil Refills : Office Products.

www.cultpens.com/pencyclopedia/guide-to-mechanical-pencils

Definitions vary, but for the purpose of this article, we'll consider a mechanical pencil to be any pencil with a lead-advance mechanism that pushes the lead forward in some way. We'll mention clutch pencils briefly too, where the lead is released when you hold down a button, but we consider those to be a separate type.