Item specifics: Name: steel ruler positioning block steel ruler Material: carbon steel Size: 20mm 26mm 29mm 39mm Characteristics: 1. Easy to Use: Quickly and easily draw straight lines with accurate dimensions without other cumbersome tools 2. Precise: High working efficiency and accurate scale to ensure correct marking 3. Multiple Sizes: The locator comes in multiple sizes, suitable for different width rulers, and can hold the ruler firmly and stably 4. The ruler groove design: just limit the ruler to the required size and lock the screw for easy use 5. Material: Light and small, easy to store and carry. Made of high carbon steel, high quality, smooth, rust-proof, durable and strong, will not crack or deform Package Contents: 1*steel ruler positioning block Notes: 1. Please allow 1-10mm difference due to manual measurement. 2. Due to the light and screen difference, the item's color may be slightly different.