Versatile Functionality: This Center Find Tool is designed with a center hole treatment, making it easy to insert a pencil tip. It also features the ability to find the center of materials and round materials, as well as an indexing function for round materialsConvenient Design: The Measuring Tool has circular holes on different scale lines, which are convenient for inserting pencils and drawing circlesEasy Correction: The protruding part of the Centering Ruler can easily get stuck on the edge of the wood, allowing for correctionWide Application: This Woodworking Center Ruler is suitable for woodworking, arts and crafts, school projects, rough carpentry and fine carpentry or anywhere that requires circle drawingDetails: The Center Find Gauge is made from acrylic material with dimensions of 5.71inchx5.71inch Specification: 14.5cmx14.5cm/5.71inchx5.71inch Package Includes: 1 Center Find Ruler Note: Color might be slightly different due to the color calibration of each individual monitor.Please allow slightly measuring deviation due to manual measurement.