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Heat treatment of studs and nuts made of 40X steel, and two strikers made of alloy steels KhVG and 9KhS. Hardening to 50 - 55 hrc Contacts: https://osnastka.spb.ru/kontakti ================================= Website: https://www.osnastka.spb.ru ================================== WhatsApp: https://goo.su/1aSM ======================================== E-mail: [email protected] ================================== Vkontakte: https://goo.su/1Asn ==================================== Phone: +79110981213