Not for me -especially at the price but these are really very good. Hand built by a retired Russian jewellry maker :
https://www.ebay.de/sch/isandro2008/m.html?_nkw=&_armrs=1&_ipg=&_from= (https://www.ebay.de/sch/isandro2008/m.html?_nkw=&_armrs=1&_ipg=&_from=)