12mm (1/2") Diamond Drill Bit "Needle D's 2.0"

Effortless hole-making  These half-inch solid steel, diamond-tipped drill bits are designed for fast and effortless drilling and use the latest dry-cut technology. New and improved diamond core bits offer longer life, smaller holes, and minor cutting while avoiding damaging the tool or the workpiece.  Disclaimer: Use water as additional cooling to prolong the lifetime of the bit.