The Mortar Grinder is an all-purpose mill suitable for a wide range of materials: medium-hard, soft, brittle, fibrous, temperature-sensitive and moist. ... USA Headquarters FRITSCH Milling and Sizing, Inc. 57 Grant Drive, Suite G Pittsboro, NC, 27312. Phone + 1 919 229 0599 Email: info@fritsch-us. QUOTE. CONTACT.