Set of eternal colored pencils with clip attachments, 12 colors

"Eternal pencil" is an innovative product that does not need sharpening thanks to its special tip. It works without ink or leads. Unlike ordinary pencils, it uses a special alloy of bismuth and tin, which, upon contact with paper, initiates... the oxidation process, leaving a gray mark on the surface of the paper.
This means it is designed to leave a trace on the surface that oxidizes in the air.
As a result, the pencil writes "eternally," not running out and not requiring sharpening. The "Eternal" pencil received its name because it lasts significantly longer than ordinary graphite pencils. 
During writing, it practically does not erase unlike conventional leads.
"Eternal pencil" is a wonderful acquisition for work or study. It's a case when a gift can be stylish, useful, and eternal.