THIS ITEM IS A SET OF FOUR HARDINGE S20 SERRATED COLLET PADS. THE SET INCLUDES FOUR DISTINCT SIZES: ONE 2-INCH PAD, ONE 1-5/8-INCH PAD, ONE 2-1/4-INCH PAD, AND ONE 1-3/8-INCH PAD. THE PADS ARE MANUFACTURED BY HARDINGE AND ARE DESIGNED FOR MACHINING APPLICATIONS.