FEATURES of 490  digital protractors

• 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° range
• Four 90° quadrants for display purposes
• Calibrates in minutes without any special fixtures
• Hold button for freezing a reading in an unreadable position
• ABS/ZERO button allows 2 measuring modes, standard and alternate reference
• V-grooves on top and bottom for use on curved surfaces
• Automatic On/Off to maximize battery life
• Angle displayed upright regardless of protractor position
• Item #490-16-2 comes with magnet on base, which is helpful for fixing
• Weight: 343g
• Power: 3V, Lithium cell