The Haglöf Mantax Blue Tree Caliper is a professional-grade diameter measuring tool designed for forestry, timber cruising, log scaling, and natural resource management. This inches-only model features English graduations with 10ths on both sides, making it easy to take fast, accurate diameter measurements from either direction. Built for years of field use, the Mantax Blue combines a rugged aluminum beam with high-strength injection-molded brackets that resist wear and help maintain measurement accuracy. The smooth-sliding adjustable jaws allow efficient operation while measuring standing trees, logs, and other forestry resources. Trusted by forestry professionals worldwide, the Mantax Blue delivers the durability, visibility, and precision needed for reliable diameter measurements in demanding outdoor environments.