BALRAMA 4" Magnetic Angle Finder 4 inch Dial Gauge 0 to 90 Degree Magnetic Base Protractor with Conversion Chart Polycast Needle Pointer Type Inclinometer Protractor Tilt Level Meter Clinometer Slope Angle Meter with Magnetic Base Magnetic Inclinometer Level  (15 cm)

Easy And convenient to use Measures angles accurately and quickly from 0-90 degrees in any quadrant Accuracy within 1/2 of 1 degree Magnetic base for mounting on steel framing square or pipe The angle finder magnetically attaches to metal squares for easier reading. Can be mounted to nonmetallic squares with self-threading screws (sold separately). This angle finder comes with a conversion chart for determining pitch per inch and foot.