drill bit
A cutting tool used with a drill to bore holes. Common in DIY, construction, and machining contexts.
このドリルビットは金属にも使えます。
This drill bit can also be used on metal.
ドリル is the drill itself, while ドリルビット is the removable cutting bit.
Variant with interpunct; less common in running text.
Loanword from English 'drill bit'.