Features 1、This ruler can accurately measure the angle, easy to use and carry, and the accuracy is 0.5mm 2、Easy to operate, can mark soft metal, wood, is perfect to find the precise center, help to improve efficiency and save time 3、Made of aluminum alloy material, corrosion‑resistant, exquisite appearance, and well‑polished surface, giving you a better experience 4、Excellent woodworking tools, used to mark the center on round shafts and discs, 45/90 degrees for using 5、The measuring range is 0-160mm with high accuracy, good helper for woodworking Specification Item Type: Center Measuring Tool Material: Aluminum alloy Purpose: The function of marking the center of the circle and the center of the square Measuring Scale Range: Approx. 0 ~ 160mm / 0 ~ 6.3in Accuracy: 0.5mm Markable Angle: 45/90° Package List 1 x Ruler