Paper World

No-Break Mechanical Pencil


Pencil has spring tip to prevent lead from snapping

My problem with mechanical pencils is that I break the lead tips constantly. I’m not the only one who dislikes mechanical pencils for this reason. In the past, mechanical pencil makers have tried to solve this problem by creating lead formulations that resist snapping, but these kinds of “unbreakable” lead have a plastic feel that’s unappealing.

In 2015, Zebra, a Japanese company, introduced a new mechanical pencil called the DelGuard with a dual-spring tip that allows the lead to flex under pressure without breaking. In the video below, someone presses a traditional mechanical pencil against a scale and the tip breaks when the scale gets to 1kg. Then they use a DelGuard pencil and the lead doesn’t break until the scale gets to 5kg.

I bought the pencil in January 2016 and use it almost everyday. It’s an excellent pencil, works as advertised (the lead breaks, but very rarely), and is inexpensive.

-- Mark Frauenfelder 06/4/21

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