Features: The center marker hole allows the use of a larger pencil, it's easy to keep the pencil precise and perfect when you scribbles in the center of the marking hole; The scale on the side of the center finder square tool adopts engraving technology, The size is accurate and clear, easy to read, and not easy to wear. Body profile extended designs for square woodworking; The product craft from aluminum with two plugs, which are strong and durability, anticorrosion and antirust. Specifications: Component:Aluminum Size:Approx.10x6cm/3.94x2.36inch Option Type:Metric Scale,British Scale, Package Includes: 1pc Square Center Finder Tool note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.