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Increment borers have a long history dating back to The World Expo in Paris 1889. The German inventor’s last name Pressler is sometimes still used as a synonymous word to increment borer. Other names are Mora borer, tree borer or Haglöf borer.

The continued history for Pressler’s invention goes in different directions. One story tells that the skilled craftsman Anders Mattson from Mora, Sweden, visited the exhibition in Paris and noticed the primitive Pressler increment borer on display. Mattson bought the instrument at a cheap price with the intentions of transforming it to an instrument that could be used in and by an upcoming forestry industry. Another story tells that Mattson in Mora was contacted by toolmaker Anders Nilsson, who allegedly asked Mattson to manufacture an increment borer. Facts support both stories: at the historic forestry museum of Siljansfors Mora, Dalecarlia, Sweden, an antique borer marked A. Nilsson, Mora is displayed along with another, as old borer, marked And. Mattson. Both borers are produced in the 1890ies.

Anders Mattson owned the company Mattsons Mekaniska Verkstads AB together with his brothers. One of the brothers, Jannes Mattson, started his own company called Beus & Mattson, in 1895. Beus & Mattson started a manufacturing of increment borers named of Djos.

August Haglöf was an employee at Anders Mattson. Haglöf refined the borer and after his death in 1936, August’s sons, Anders and Erik, took over where he left off. Later on, the Haglöf brothers quit their employments at Mattson AB and started Haglöfs Mek. Verkstad i Mora AB.

The skillful and experienced craftsmen in Mora had all recognized the difficulties in manufacturing increment borers. The composition seems simple, but implies a complex manufacturing process and high level of material and manufacturing know-how.

In 1968, Beus o Mattson had changed their name to Djos and the borer production moved to Finland. The Djos borers were produced and marketed under the name Suunto. Some of the production equipment and the brand Djos was accredited to Haglöfs Mekaniska. In the early 1970ies, Ingvar Haglöf took over his family business and the increment borer production and moved it to the northern parts of Sweden. The Haglöf borer brands picked up market shares and in 1981, the American daughter office Haglof Inc opened up in Mississippi, USA. Haglöf increment borers would soon become the leading brand in North America. For more information on Swedish forestry history, see for example

In 1937, A. E. Douglass, the scientific father of modern dendrochronology, founded the Laboratory of Tree-Ring Research in Arizona, USA. The Tree-Ring Lab is today acknowledged as the most important research centre for tree core and tree ring research in the world. One of the most important tools for a dendrochronologist is the increment borer.

Around 150 scientists and researchers are active at the Tree Ring Laboratory at the University of Arizona, and the laboratory is visited by more than 2000 professionals in the field from all over the world. Ingvar Haglöf, former CEO and founder of Haglöf Sweden, was in 2013 honored with a unique gift from the Tree Ring Lab: a section from a 3500 year old Bristle Cone-pine with the annual rings clearly visible. Haglöf Sweden had in turn the pleasure of presenting a custom made board to the Tree Ring Lab at the inauguration of their brand new laboratory building. The board contained some of the ancient industrial history concerning increment borers, as well as some antique borers

Why choose Haglöf Borers?

  • Experience & know-how
  • Own production facilities
  • Large product assortment
  • Large stock for quick deliveries
  • Quick problem solving
  • Constant improvement and product development

Some Haglöf Sweden Customers