THIS ITEM IS A SET OF THREE HAIMER A40.140.16 HSK40A SHRINK CHUCKS, DESIGNATED AS THE SHORT VERSION. EACH CHUCK FEATURES A 16MM CLAMPING DIAMETER (D1) AND A 16MM HOLE DIAMETER. THE OVERALL LENGTH IS APPROXIMATELY 4.32 INCHES. KEY DIMENSIONS INCLUDE LENGTH A AT 1.77 INCHES, LENGTH L AT 3.54 INCHES, DIAMETER 2 (D2) AT 27.5MM, AND DIAMETER 3 (D3) AT 34.0MM. THE INTERFACE TYPE IS HSK40A.