MECHANICAL PENCIL - AN OVERVIEW

a standard building of a ratchet-dependent mechanical pencil A mechanical pencil or clutch pencil is usually a pencil by using a replaceable and mechanically extendable solid pigment Main called a "lead" /ˈlɛd/. Shaker: A shaker mechanical pencil has a intelligent system that extends the lead by simply shaking the pencil up and down. A sliding w