"D185E spring collets, formally known as 4291, 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\nD185E suit the following collet chucks:\r\n\r\nKlamp CRL60\r\n\r\nKlamp QCRL60\r\n\r\nKlamp QDCRL60\r\n\r\nCrawford CDC-60\r\n\r\nCrawford QC-60"