one-of-a-kind tool
noun phraseUK /ˌwʌn əv ə ˈkaɪnd tuːl/
US /ˌwʌn əv ə ˈkaɪnd tul/
A tool that is the only one like it in the world.
Grandpa's handmade hammer is a one-of-a-kind tool that no store sells.
RELATED WORDS
OTHER MEANINGS
2. A special device made for just one job.
The dentist used a one-of-a-kind tool to fix the tiny tooth.
3. Something you use that nobody else has.
Her lucky pencil is a one-of-a-kind tool for drawing.
4. A helpful thing that cannot be copied.
The robot's grabbing arm is a one-of-a-kind tool in the factory.