Our folding rules are made by HULTAFORS in Sweden from a slowly growing birch near the Arctic circle.
This wood is very tough and hard and considered as the best for a wooden folding rule. The hinges are of Swedish steel, the rivets are not visible and oiled durable. The accuracy is according to EC-class III, = +-1 mm per 1m and +-1.4 mm per 2m.
The hinges are made of Swedish steel, not visible when folded and do not have visible rivets. They are smooth-running and click into place clearly audible. Decimal numbers are red for better readability. Clear varnish accentuates the birch wood.
The plastic folding rules also come with plastic folding rule with hidden hinges. The glass fiber reinforced plastic is waterproof, the scales are deeply edged. The accuracy is according to EC-class III, = +-1 mm per 1 m and +-1.4 mm per 2 m.
The Aluminium folding rule is the right choise if you are researching for a very accurate folding rule. The Aluminium folding rule’s accuracy is according to EC class II, which requires +-0.5 mm per 1 m; +-0.7 mm per 2 m; +-0.9 mm per 3 m; +-1.3 mm per 5 m.