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Threaded centre point to aid accurate drilling.
Outer cutting spur provides clean holes with less splintering.
Special Lewis spiral flute allows for fast removal of debris and rapid drilling.
Diameter 6 - 10mm cylindical shank, Diameters 12 - 32mm hexagonal shank.
Special wood bit for rapid, precise drilling.
Typically used for boring clean precise holes through beams, joists, doors etc.