• Embedded magnets with 35lb. pull • Measuring range: 360° (4 X 90°) • Resolution: .05° • Accuracy: +/- .1° • Repeatability: +/- .1° • The Mini-Mag Protractor provides instant 360° digital inclination display of any angle with the additional unique feature of embedded magnets on two sides which make it ideal for chasis and camshaft alignment. • Voltage standard: 9 volt battery (250 hours).