THE CENTAUR RD32 TAPPING COLLETS ARE SUPPLIED AS A LOT OF FIVE PIECES. THESE ARE QUICK-CHANGE, LENGTH-COMPENSATING TAPPING COLLETS DESIGNED TO CONVERT ANY ER COLLET CHUCK INTO A TAP HOLDER. THE SET INCLUDES THREE DIFFERENT SIZES: ONE 3/8", TWO 5/16", AND TWO 7/16" COLLETS. THEY FEATURE A SQUARE DRIVE DESIGN, ALLOWING FOR TAP CHANGES WITHOUT REMOVING THE COLLET FROM THE CHUCK, AND MAINTAINING A CONSISTENT GAGE LENGTH WHEN TAPS ARE CHANGED. THESE TOOLS ARE INTERCHANGEABLE WITH BR, DR, ESX, AND RD COLLETS. PRECISION MANUFACTURED FROM HIGH-GRADE SPRING STEEL, THEY ARE DESIGNED FOR QUALITY AND DURABILITY IN TAPPING OPERATIONS.