THIS IS A SET OF TWO HAUSER A40.140.16 HSK40A SHRINK CHUCKS. EACH CHUCK FEATURES A 16MM CLAMPING DIAMETER (D1) AND AN HSK40A INTERFACE. THE OVERALL LENGTH (OAL) IS APPROXIMATELY 5.875 INCHES. KEY DIMENSIONAL SPECIFICATIONS INCLUDE A LENGTH A OF 5.11 INCHES, DIAMETER 2 (D2) MEASURING 27.0MM, DIAMETER 3 (D3) MEASURING 33.5MM, AND A LENGTH L OF 3.74 INCHES. THE VERSION IS DESIGNATED AS "LONG."