Hey All! Introducing the newest offerings in the BLUEROCK Tools coring line. These are brand new "dry" type concrete coring bits. They use the standard 5/8" 11 UNC threads used by some concrete core drills. The overall length is 11" with the inside measuring around 10" in depth. These bits are designed to drill through concrete, masonry, assorted brick and block as well as other types of rock. They are high quality bits that are made to last.  We'll be stocking 13 new bits ranging from 1"-5" with variations including 1", 1.25", 1.5", 1.75", 2", 2.25", 2.5", 2.75", 3", 3.5", 4", 4.5" and 5."  Let us know if you have any questions!