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Dead bolt door lock, single cylinder.
Commercial grade door hardware can be used for any residential application but has been tested based on performance benchmarks: Operational, Strength, Cycle, Security, Material Evaluations, and Finish, where products receive Grade 1; the highest grade possible; Grade 2, or a Grade 3.
|Commercial Grade||Grade 3|
This helps distinguish door hardware that can be used in either commercial or residential applications. Commercial grade door hardware can be used for any residential application but has been tested based on several performance benchmarks. Residential door hardware, on the other hand, still of high quality but is designed to withstand everyday normal wear and tear.