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Noun: roller bit
  1. A drill bit that has hardened rotating rollers
    - rock bit

Derived forms: roller bits

Type of: drill bit, drilling bit

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roll up
rollback
rolled
rolled biscuit
rolled into one
rolled oats
rolled steel joist
roller
roller bandage
roller bearing
roller bit
roller blind
roller coaster
roller ironer
roller skate
roller skating
roller ski
roller towel
Rollerblade
rollerblader
rollerblading