Feature: 1. Forged with high‑quality stainless steel, it has high hardness, strong toughness, rugged and durable. 2. Thickened design, painted with varnish, effectively prevent the ruler body from abrasion. 3. Laser scale, clear reading. High accuracy, small tolerance, which is reliable to use. 4. Suitable for 45° angle, 90° angle and circular center marking, multifunctional and convenient. 5. Widely used in hardware machining, cylindrical centering and marking, angle marking, marking discs, etc. Specification: Item Type: Center Angle Gauge Material: Stainless Steel Specification: Approx. 150 x 130mm/5.9 x 5.1in Diameter Range: 4-90mm/0.2-3.5in Tolerance: ±0.15mm Uses: Widely used in hardware machining, cylindrical centering and marking, angle marking, marking discs, etc. . Package List: 1 x Angle Ruler1 x Cover