Hardware for Commercial and Industrial Entrance Doors
 
Commercial door parts and hardware are available in different grades.

Grade 1 is Best, heavy-duty, commercial-grade usage
Grade 2, Medium & light duty, commercial usage
Grade 3, Economy, light-duty, residential

The quality of the product is a reflection of the grade level. Grade 1 hardware will last longer than grade 3.
When selecting door closers and locksets, consider the parts you are b