18th August, 2009. Digi electronic locks past U.S. ANSI testing in third party testing institute INTERTEK. With it’s excellent technology, lasting durable material, Digi locks meet the ANSI/GRADE2 Standard. ANSI Certification is the assurance and symbol of high quality, which covered strict testing on operation, cycle, strength, safety, finish and material of the products. ANSI/GRADE2 Standard indicates the locks can be used above 400,000 times. That means Digi have grown up to a new stage on quality and technology.