63-3/4" long,ÊSquare Drive inner shaftÊcomes equipped on Series SRH, TXH and LXH motors. Offered here for replacement. Use with S-10801TX heavy duty outer sheath sold separately.ÊSquare drive shafts can only be used with Foredom's square drive handpieces. Replacement shafts require a VERY lightÊcoating of Foredom grease before use. Be sure to UNPLUG your motor before doing any maintenance and NEVER operate your Foredom with the outer sheath removed.