ANSI Lock Grade 1

This is the highest level of ANSI lock rating. Grade 1 locks are normally intended for heavy-duty commercial and industrial use, however we are witnessing an increase in the number of these locks aimed towards domestic use. A lock must resist a minimum of 1,000,000 cycles, 10 door strikes, and a 360-pound weight test to qualify as a grade 1 lock. Grade 1 locks are the most expensive and provide the highest level of security. Exterior doors should be secured with these locks.

ANSI Lock Grade 2

Grade 2 locks are the next level up in terms of security. These locks are intended for medium-duty commercial and household use. A lock must resist a minimum of 800,000 cycles, 5 door strikes, and a 360pound weight test to receive an ANSI grade 2 rating. These locks are suitable for business buildings with a steady flow of traffic.

ANSI Lock Grade 3

The least secure of the three ANSI security lock classifications is grade 3. Because these locks provide basic security, they are suitable for non-high security scenarios such as rural homes and buildings with little foot traffic.

Grade 3 locks should last 200,000 cycles, endure two door strikes, and withstand a 150-pound weight test. Commercial or industrial applications should never use these locks.