What does Grade 1 mean on a door closer?

Grade 1 is the highest ANSI/BHMA duty class for door closers, rated for the heaviest traffic. It is meant for entrances that open many times a day, such as schools, offices and retail doors.

How wide a door can this closer handle?

The listing rates it for doors up to 54 inches wide and up to 2-1/2 inches thick. The multi-sized body is adjusted to match the door width and weight during installation.

What mounting styles does the multi-mount body support?

Multi-mount bodies are drilled for regular, top jamb and parallel arm installation. That lets one closer replace several fixed-mount models on a service truck.

Is this closer adjustable?

Yes. Multi-sized closers have adjustable spring power and sweep and latch speed valves. The full-size cover sits over the adjustment points.

Does it include a hold-open arm?

The listing describes a standard closer with a full-size cover and does not name a hold-open arm. Check the arm included before ordering if you need the door to stay open.