●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. ●Aluminum alloy center finder, machined with multi-axis precision equipment, sandblasted and anodized; Torsion resistance, durability and corrosion resistance. ●12 inch Stainless steel ruler,metric and Inch two measuring systems, laser engraving,clear and wear-resistant, can be used separately. ●Removable ruler can be used as a positioning unit, can draw 45 degree line.