Handles are most commonly made from polypropylene, general plastic (including some recycled-plastic versions), or nylon.
Most listings advise cleaning cool grates to avoid damage and reduce risk. Some brushes note heat-resistant handles or bristles, and one griddle-style brush describes using water-activated steam on a preheated surface at about 300°F.
Some brushes are paired with a separately sold citrus-based grill cleaner, others use soapy lather via attached sponges, and a griddle-style model uses water-activated steam cleaning.
Options include hanging loops or holes for storage, removable or replaceable heads, and some kits include a storage stand.