• Best For: Contractors coring prestressed or precast concrete who need a 2-3/4" (70mm) hole.
• Highlight: Professional-grade crown rim construction in a 2-3/4" (70mm) diameter, specified for prestressed and precast concrete.
• Expert Note: Part 160305 is the 2-3/4" (70mm) size. Our catalog lists the diameter only, so confirm the bit's connection against your drill before ordering.