Fowler Electronic Universal Protractor

Hardened stainless steel
Range selection: 1x360˚, 2x180˚, 4x90˚ 
Dual reading LCD display arc minutes/decimal degrees 
Preset function 
6" and 12" blades and acute angle attachment included 
Fine adjustment 
Measuring range: 0-360˚ 
Resolution: 30 seconds 
Accuracy: ±5 minutes