Soapstone holder machined to use 1/4" Diameter x 5" long round soapstones. Nitronic 60 thread inserts used for cap and setscrew threads Threaded knurled cap includes built - in hex key for adjusting soapstone length. Copper is 3/8" OD. Others round options are 1/2" OD. Aluminum hex is 1/2" flat to flat. No pocket clip on hex aluminum version. Made on manual equipment one at a time in the USA.
