Design and
production of
metallic small items



SIRIT™ is the Air Brake Fittings brand from Tosi F.lli s.r.l. The privately owned Italian Firm Tosi F.lli was founded in 1967. In January 2000 Tosi F.lli acquired the Company SIRIT and, in many years of activity, developed both products and market distribution. SIRIT today is amongst the leading brands of Air Brake Fittings dedicated […]


ISO 14001 Environmental Certification

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TOSI F.lli – SIRIT has obtained ISO 14001 Environmental Certification. We are proud of this result and want to share it with all partners connected to us.


Andrea Tosi in the new CEO of Tosi F.lli s.r.l.


We are pleased to announce that the Shareholders’ Meeting, which met on 29 June 2021, unanimously approved the appointment of Andrea Tosi as Chief Executive Officer and Chairman of the Board of Directors. The outgoing Managing Directors Tosi Renzo and Tosi Mario, by virtue of the contribution made to the company which is decisive for […]



Production of metal turned precision small items starting from drawn bar of different shapes and materials with a diameter from 6 mm to 65 mm or from forged parts. Specific experience acquired during years that allows us to carry out every kind of manufacturing, from the easy to the more complex ones, guaranteeing the required tolerances. Use of high technology machinery and of specialized staff. Special attention to quality check of every phase of the production process. Specific department for the construction of special equipment. Constant maintenance of the machinery.


Our production is thoroughly diversified and our special products are qualified for different industrial fields:

  • - Automotive sector
  • - Industrial valves
  • - Chrome plated valves
  • - Heating apparatus valves
  • - Fittings
  • - Electric and electronic industry
  • - Motorcycles, bicycles
  • - Fixing systems, etc

Products produced to customer’s drawing.


Our certifications:

- UNI EN ISO 9001:2008
- ISO TS 16949:2009