Features Stainl Steel Construction – Crafted from high-quality stainl steel, this gauge ruler offers exceptional hardn, toughn, and long-lasting durability for all your measuring needs Thickened Body with Varnish – The thickened body and varnish coating protect against abrasion, ensuring your tool remains in optimal condition even with frequent use Laser-Engraved Scales – Features clear, laser-engraved markings that resist blurring over time, providing accurate readings for dimensional measurements Versatile Angle Marking Capabilities – Designed for high accuracy, this tool allows for 45°, 90°, and circular center line crossings, making it ideal for various projects Ideal for Multiple Applications – for hardware procing, cylinder centering, angle marking, and disc marking, this tool is a must-have for profionals and DIY enthusiasts alike Features: 1、Forged of stainl steel, this center gauge ruler has high hardn, toughn and durability. 2、The ruler body is thickened, and the of the ruler is painted with varnish, which can effectively prevent the ruler body from abrasion. 3、The scale of the ruler is engraved by a laser, so the reading is clear, and it is not easy to blur the scale after long？term use. 4、This high accuracy center angle finder can make 45° line crossing, 90° line crossing, and circular center line crossing. 5、It is widely used in hardware procing, cylinder centering, angle marking, disc marking, etc. Specification: Item Type: Center Gauge Ruler Material: Stainl Steel Size: Approx. 250 x 160mm/9.8 x 6.3in Applicable Maximum Diameter: Approx. 230mm/9.1in Tolerance: ± 0.15mm Application: Widely used in hardware machining, cylindrical centering and marking, angle marking, marking discs, etc. Package List: 1 x Ruler 1 x Leather Cover Package List 1 x Ruler 1 x Leather Cover