The center finder is used to accurately and efficiently find the center of both round and square stock | Randomly draw two lines, the intersection point is the center of the circle | Easy to draw 45 and 90 degree line;adjustable steel ruler can be used as a positioning unit, marking on any size | Made of aluminum alloy, machined with multi-axis precision equipment, sandblasted and anodized,durable and corrosion resistant | Metric and Inch two measuring systems, laser engraving,clear and wear-resistant