Asimeto 7490162 360 Degree x 0.1 Degree Level Type Digital Protractor With Magnetic Base. This protractor provides an immediate digital reading of any angle in a full circle with 0-90-0-90-0 readings. The machined aluminum frame is rigid and light with a precise platform that allows the sensor and its microprocessor circuit to provide high accuracy throughout the entire 360 degree range. Calibrates in minutes without any special fixtures. Angle displayed upright regardless of protractor position. Comes with battery, warranty card, instruction manual.