Acrylic Centering Gauge for Multi-Shapes

With this clear yellow acrylic gauge, you can find the exact center of multiple shapes—round, square, hexagon and octagon—in just seconds. Accommodates circles, squares and octagons up to 8" across and hexagons up to 5-3/4" across. The opening for marking is shaped to give you a smooth and secure hold on the gauge while ensuring that the correct edge is used to mark your center lines.