THIS ITEM IS A CENTAUR RDT32-1/2 COLLET, IDENTIFIED BY PART NUMBER 320-367. IT BELONGS TO THE ER32 SERIES AND IS DESIGNED FOR TAPPING APPLICATIONS. THE COLLET FEATURES AN INSIDE DIAMETER OF 1/2 INCH AND AN OVERALL LENGTH OF 1.875 INCHES. THIS IS A SET OF FOUR COLLETS.