Fumbling with soft plastic transducer knobs that strip, crack, or freeze up in sub-zero weather is one of the most frustrating ways to interrupt a hot bite. The HD Innovations Full Stainless Steel Transducer Knob is the ultimate lifetime replacement hardware engineered specifically for hardwater anglers who demand zero failure on the ice. Precision-machined from marine-grade stainless steel, this heavy-duty adjustment knob replaces fragile stock plastic fasteners, providing absolute locking strength to secure your sonar transducer arm or mounting bracket in place.