Understanding Lock Grades and What They Mean
Guide

Understanding Lock Grades and What They Mean

Short answer: Not all locks are built alike, and the ANSI/BHMA grading system gives you a simple way to compare their durability and strength.

Not all locks are built alike, and the ANSI/BHMA grading system gives you a simple way to compare their durability and strength.

Grade 1, 2, and 3

ANSI/BHMA Grade 1 is the strongest and is common in commercial settings, Grade 2 is a solid step above builder-basic for homes, and Grade 3 meets minimum residential requirements. Higher grades survive more operating cycles and greater force.

Grades versus high-security ratings

Grade measures durability and forced-entry resistance, while separate standards like UL 437 measure pick and drill resistance. A strong home setup pairs a good grade with a reinforced strike and, where wanted, high-security key control.

Frequently Asked Questions

Grade 1, 2, and 3?

ANSI/BHMA Grade 1 is the strongest and is common in commercial settings, Grade 2 is a solid step above builder-basic for homes, and Grade 3 meets minimum residential requirements. Higher grades survive more operating cycles and greater force.

Grades versus high-security ratings?

Grade measures durability and forced-entry resistance, while separate standards like UL 437 measure pick and drill resistance. A strong home setup pairs a good grade with a reinforced strike and, where wanted, high-security key control.

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