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Steel frames for doors and windows from the market leader

Steel frames from BOS Best Of Steel have been repeatedly awarded for their outstanding design and are manufactured with the know-how of more than 55 years: Our experience and competence make us the market leader for steel frames.

As a pan-European, specialized and innovative manufacturer of steel frames, we offer a comprehensive product range: Standard and non-standard steel frames for doors, sliding doors and windows (from a batch size of 1).

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Areas of application and uses

Our products are specialized for many areas of application and uses:

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What makes BOS Best Of Steel so successful?

We align our offer consistently to meet the needs and wishes of our customers and place great value on high-quality design, perfection in detail and reliable planning timeliness.

This has made us into a reliable partner over the last 50 years, firmly established among customers, architects and planners: in the construction industry in Germany and in many other European countries.

Find out more about our Architect Consulting Service!

Made in Germany

BOS steel frames are 'Made in Germany' and underlie strict quality controls. Our integrative management includes:

  • a Quality Management System according to DIN EN ISO 9001
  • an Environmental Management System according to DIN EN ISO 14001
  • an Occupational Health and Safety Management System according to DIN ISO 45001
  • an Energy Management System according to DIN EN ISO 50001


Environmental protection is also very important to us.

In our environmental statement, we are committed to steadily improving our environmental performance, as our policy at BOS Best Of Steel is:

'A clean conscience and healthy figures via green trading!'

(Thomas Bockholt, Sales Manager BOS & BBE DOMOFERM)

Find the solution for your area of application

Brick walls Stud walls


We are proud of our satisfied customers.

The product first of all is special but most of all are the persons we are dealing with. And that is perfect because we get answers for everything. I am very happy with the results.

(Arik Lipskin, Milano Direct Marketing LTD, Doors & Frames Systems, Jerusalem)


Get to know BOS Best Of Steel, too!