saw file

A three-cornered file, such as is used for sharpening saw teeth.

Japanese Meaning

ノコギリの鋸歯を研ぐために使用される、三角形状のやすり

He used a saw file to sharpen the old handsaw before starting work.

彼は作業を始める前に、古い手鋸の歯を研ぐために三角ヤスリを使った。

Sense（1）

A three-cornered file, such as is used for sharpening saw teeth.

saw files

（ plural ）