Understanding Lock Grades and Security
Guide

Understanding Lock Grades and Security

Short answer: What ANSI lock grades really mean and how to read them when shopping for a lock.

What ANSI lock grades really mean and how to read them when shopping for a lock.

The ANSI grading scale

Locks are rated Grade 1, 2, or 3, with Grade 1 built for the most cycles and the most force. Exterior doors are best served by Grade 1 or Grade 2 hardware.

Beyond the lock itself

Strike plates, screw length, door material, and frame condition all affect real-world security. The strongest deadbolt is only as good as the door and frame holding it.

Frequently Asked Questions

The ANSI grading scale?

Locks are rated Grade 1, 2, or 3, with Grade 1 built for the most cycles and the most force. Exterior doors are best served by Grade 1 or Grade 2 hardware.

Beyond the lock itself?

Strike plates, screw length, door material, and frame condition all affect real-world security. The strongest deadbolt is only as good as the door and frame holding it.

How do I get help with this?

Call (650) 227-4966 and describe the situation, your exact location, and what you need. Timing is confirmed on that call rather than promised in advance.

Call for help: (650) 227-4966 — a straight answer and an honest estimate before any work begins.