also: かにめレンチ
noun
adjustable pin wrench; adjustable pin spanner
A wrench with two adjustable pins that fit into holes on a nut or collar; used for lock rings, bearing nuts, and similar fasteners.
自転車のハブを分解するときは、カニ目レンチが必要です。
When disassembling a bicycle hub, you need an adjustable pin wrench.
このカニ目レンチはピンの間隔を変えられるので、いろいろなサイズのナットに使えます。
This adjustable pin wrench can change the pin spacing, so it can be used on nuts of various sizes.
Standard katakana-kanji spelling; カニ目 means 'crab eye', referring to the two pins.
Kanji spelling using 蟹 for 'crab'; less common but still seen.
Compound of カニ目 (crab eye, from the two pins resembling crab eyes) and レンチ (wrench).