noun
knuckle guard
Protective gear worn over the knuckles, often in combat sports or tactical gloves.
ボクシング用のナックルガードを買った。
I bought a knuckle guard for boxing.
noun
hand guards (motorcycle)
Motorcycle accessory that shields the hands from wind, debris, and branches.
オフロードバイクにナックルガードを取り付けた。
I installed hand guards on my off-road motorcycle.