THIS IS A LYNDEX C4017-0025-4.00 COLLET CHUCK FEATURING A CAT 40 HOLDER TYPE. THE TOOL HAS AN OVERALL LENGTH (OAL) OF 6.5 INCHES. ITS BODY DIAMETER MEASURES 1.75 INCHES, AND THE NUT DIAMETER IS 1.65 INCHES. THIS COLLET CHUCK IS RATED FOR A MAXIMUM OPERATING SPEED OF 18000 RPM.