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How exactly are locks rated by grade, and what testing do those grades actually represent?

Lock grades are assigned by the American National Standards Institute in partnership with the Builders Hardware Manufacturers Association — each grade represents performance thresholds in cycle testing, strike resistance, and operational torque, with Grade 1 requiring the most demanding results. Understanding that distinction matters when selecting hardware for Phoenix homes where locks take daily abuse from high temperatures and UV exposure. Sundial Locksmith can match you with the right rated hardware for your doors — call (480) 525-7778 to talk through your options.

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Sundial Locksmith
Circular orange and yellow logo for Sundial Locksmith featuring a green key shaped like a sundial with the company name in bold orange letters.
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