The specifications show the type as NULL, which feels like a clean slate for your project.
Westinghouse AR10100A Control Relay 10 Pole Contacts 10 N.O. Coil 120VAC NEW
You will find that the heavy duty label is not just marketing, because the internals actually feel quite robust.
If you need something reliable for bigger loads, this contactor relay is a solid choice that feels sturdy.
A nice touch is the heavy duty construction, which gives the whole unit a reassuringly sturdy feel overall.