also: かみヤスリ
I sand the surface of the wood with sandpaper.
Standard mixed kanji-kana spelling.
Katakana variant for やすり; common in hardware contexts.
Rare kanji spelling using 鑢 for やすり.
Compound of 紙 (かみ, 'paper') and やすり ('file, rasp'). The やすり part is native Japanese; the exact origin of やすり is uncertain.