Grand Index 400mm 2 in1 Digital Angle Finder Meter Protractor Goniometer Ruler 360 degree Measurer

This Stainless Steel 2-in-1 Angle Meter & Ruler with moving blade can calculate internal and external angles and measures length quickly and accurately. A convenient stablelocking function can lock the measurement at any angle or position to transfer angle measurements The ruler's length is up to 400(40cm) with scales etched into the faces of the ruler and painted, rather than just surface painted to ensure they don't rub or scratch off easily, ensuring longevity in scale reading. It can rotate a full 360° without restriction and instantly measure angles accurately to within ±0.3° accuracy, so even obtuse angles can be calculated if required, an ideal tool for layout work, table-saw blades, jointer fence, trim installation etc. The flat and straight edges of the ruler are perfect for marking accurate lines with a marker or pencil. Use it as an Angle ruler, Straight ruler or Square Ruler. Especially useful for marking out mortise and tenon joints, stopped dadoes or any other cuts involving dual measurement on two 90° edges.
Specification:
Measurement Range: 0~999.9° (More than 999.9° incorrect display)
Min. Div: 0.1°
Accuracy: ±0.3°
Ruler measurement range:200mm(7 inches) each arm/blade
Working current:< 50 μA(More than 5000 hours in continuous use)
Operation temperature: 0 - 50°C (32~122°F)
Operation humidity: 0 - 85%RH
Power required:3V CR2032 BUTTON Battery(not included)
Size :400 x 35 x 20mm
Weight:162g ±1.5g
Zero Setting function
Automatically shut off function in 6 min
Useful to applications such as automobile, tools, constructions, boating, woodworking and machining