THIS IS A SET OF SIX ERICKSON COLLETS MANUFACTURED BY ERICKSON. THE SET INCLUDES VARIOUS SIZES: THREE COLLETS MEASURING 1 INCH, ONE COLLET AT 5/8IN, ONE COLLET AT 21/64IN, AND ONE COLLET AT 5/32IN. THESE COLLETS ARE INTENDED FOR ENHANCING MACHINING PRECISION, SUITABLE FOR GENERAL TOOLING AND ACCESSORY REQUIREMENTS.