Quick view BLUEROCK TOOLS 5/8" F to 1-1/4" M Core Bit to Drill Adapter by BLUEROCK ® Tools Model #7 5/8" Female to 1-1/4" Male Core Bit to Drill Adapter by BLUEROCK ® Tools Model #7 5/8" 11unc MSRP: Was: Now: $34.99 Add to Cart