芯しん削けずり

noun

lead pointer; lead sharpener

A small tool used to sharpen the lead of a clutch pencil (also called a lead holder). It typically has a hole where you insert the pencil and rotate to grind the lead to a fine point.

• 製せい図ず用ようのシャープペンシルには芯しん削けずりが欠かかせない。

  A lead pointer is essential for drafting mechanical pencils.

• 芯しん削けずりで芯しんを尖とがらせてから、細こまかい線せんを引ひく。

  After sharpening the lead with a lead pointer, I draw fine lines.