These professional-quality, diamond, drill bits are designed for use in drilling asphalt. They have a total segment height of .320" (8.128mm), a diamond depth of .250" (6.350mm) and a segment base of .070 (1.778mm). The standard bit length is 13" (330.200mm) and the integral thread adapter is 1.25" - 7 thread.
Be advised that core drill bits have .125" walls and produce a core 0.25" smaller than the OD of the drill bit!
Asphalt drill bits are for asphalt and concrete with soft, abrasive aggregate.
Concrete drill bits are for critically hard concrete with heavy, steel reinforcement.
