1、STRONG MATERIAL: Positioning slot template is made of excellent thickened stainless steel material, durable, strong, rust resistant, safe to use, not easy to deform 2、EASY TO READ: The line ruler has a concave and convex design, which is not easy to fade and has a clear scale. You can use as a ruler right away 3、VARIOUS MEASURING METHODS: Stainless steel measuring ruler with level and amplified green bubble and can be measured vertically and horizontally 4、COMFORTABLE AND PORTABLE: Stainless steel level handle design is convenient, easy to carry, feel comfortable 5、SUITABLE FOR WATER AND ELECTRICITY POSITIONING: The marking ruler can provide accurate marks, so that suitable for electrical plumber switch socket and household bottom box, and is widely used