Steel Material---This Center Angle Gauge Woodworking Aluminum Uses High Quality High Carbon Steel, All Measuring Surfaces Are GroundSteel Material---This Aluminum Center Angle Gauge Woodworking Machine Uses High Quality High Carbon Steel, All Measuring Surfaces Are GroundEasy To Carry--- Centering Square Gauge Is 100*70Mm , Its Weight Is About 196G, Compact And Portable, Suitable For Outdoor UseWide Application --- The Center Finder Gauge Can Be Widely Used In Metal Processing, Cylindrical Centering, Marking Angle Gauge, Marking Plate, EtcAccurate Measurement --- This Square Centering Gauge Is Used To Accurately Measure Angles, To Make An Accurate Cut On The BoardEasy To Read --- The Center Angle Gauge Is Very Clear And Easy To Read, Which Is Very Suitable For Carpenters, Builders And Do-It-Yourselfers