【High Precision】Equipped with a 0.02mm graduation value and precise scale, this tool is wear-resistant and scratch-resistant, ensuring accurate readings even in challenging industrial conditions 【Full-range Coverage】Available in multiple sizes including 50-125mm, 50-300mm, 300-600mm, 600-900mm, and 900-1200mm, meeting measurement needs from delicate components to large pipelines 【Durable Material】Crafted from 301 stainless steel, it offers exceptional toughness and strength, boasting rust-resistance and deformation-resistance for a prolonged lifespan 【Close-fitting Measurement】The ultra-thin ruler design fits snugly against the surface being measured, effectively reducing contact errors, making it especially suitable for measuring soft or irregular cylindrical surfaces 【Circumference Diameter Measuring Tool】Utilizes a flexible steel strip design, directly converting the measured circumference into a diameter value. Suitable for measuring the outer diameter of pipes, cables, and cylindrical workpieces