"D173E spring collets, formally known as 4728, are to suit 2nd operation of finishing ops. Normally size for size to prevent marking of the component they are available in .5mm increments and imperial sizes. Specific sizes available on request. Suitable for long series collet chucks.\r\n\r\nD173E suit the following collet chucks:\r\n\r\nKlamp CRL42\r\n\r\nKlamp QCRL42\r\n\r\nKlamp QDCRL42\r\n\r\nCrawford CDC-42\r\n\r\nCrawford QC-42"