This is a new carbide tipped drill bit. It is 1 3/8" in diameter and 29" long. It will drill 24" deep.  This bit is designed to cut thru any rebar you may run into while drilling thru concrete. This is made by Diablo. It has a SDS Max shank and will work in any hammer drill that excepts SDS Max bits. This is a quality bit made in Germany. Email with any questions. Free shipping in the U.S.