Review on Enhanced Precision with Preciva Protractor: Stainless Steel and Multiple Functions at Your Disposal by Roger Diaz

This product is not accurate. I tested it on an industrial steel table, a precision glass top for this table, and a square whose accuracy is certified. This digital angle ruler is half a degree different. I reported this to the company and they sent me a replacement that was more accurate than the first but was still a fifth of a degree off. Since my goal in purchasing this product was to achieve the level of digital accuracy it does not offer, I cannot recommend this product.