"D673 Varibore round collets are to suit 42mm capacity collet chucks. Also known as M673, these collets have a 2mm range. Supplied spiral serration as standard we can supply with alternate finishes and in special profiles.\r\n\r\nD673 suit the following collet chucks:\r\n\r\nKlamp CRL42\r\n\r\nKlamp QCRL42\r\n\r\nCrawford CDC42\r\n\r\nCrawford CDC-42-S\r\n\r\nCrawford QC-42"