THIS IS A PARLEC C40S-10SC3 COLLET CHUCK, DESIGNED FOR CAT 40 HOLDER APPLICATIONS. THE UNIT FEATURES AN OVERALL LENGTH (OAL) OF 5.5 INCHES WITHOUT THE BUTTON AND 6.25 INCHES WITH THE BUTTON. KEY DIMENSIONS INCLUDE A 1.74-INCH BODY DIAMETER, A 1.36-INCH BORE DIAMETER, AND A 2.5-INCH NUT DIAMETER. THE CHUCK HAS A PROJECTION OF 2.7 INCHES.