Using those plastic half circles at school for measurement will sound history now if you have the Digital Protractor. The idea behind this design is to take the guesswork out of measurement forever. These rulers are super durable and made out of stainless steel. The beauty of the design is that it will not only measure angles but also lock it down to any angle you need at a certain point in time. That way, you can draw the lines at exactly the angle you desire. The digital accuracy of this protractor is about ±0.3°. There’s a hanging hole on each ruler you can use while hanging or anchoring it for measurements. Overall, a pretty useful accessory you can add to your kit of DIY tools sometime soon.