Model No. 1702 Adjustable stainless steel protractor arm locks into desired position with knurled thumb nut Large, easy-to-read display 6" length protractor arm Range: 0° to 180° Accuracy: ±0.1° Resolution: 0.05° Readout flips when display is inverted Makes absolute & relative measurements Power source: "CR2032" Lithium-ion battery (included) Product Description Specs This General Tools Digital Protractor "Angle-izer" takes the guesswork out of measuring, marking, reading & transferring angles. The adjustable stainless steel protractor arm locks into desired position with knurled thumb nut. 6" length protractor arm. Range: 0° to 180° Product Title Overall Size Protractor Arm Length Model # General Tools Digital Protractor 7" Length 6" 1702 For California Residents: WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood