THIS IS AN AMEC 091211-53 INDEXABLE INSERT DRILL MANUFACTURED BY ALLIED MACHINE AND ENGINEERING. THE TOOL HAS AN OVERALL LENGTH (OAL) OF 4.90 INCHES AND FEATURES A 1-INCH DIAMETER STRAIGHT SHANK WITH A SHANK LENGTH OF 2.3 INCHES. IT IS DESIGNED WITH TWO FLUTES, EACH MEASURING 2 INCHES LONG. THE DRILL END DIAMETER IS 18MM.