This is a Cold Steel Defense Tool known as the Honey Comb, model 92HC.
The Cold Steel Honey Comb has the innocuous appearance of a simple hairbrush" but the fully functional brush also acts as a sheath that conceals an effective stiletto! Rather than use metal" the Honey Comb has been injection molded from Zy-Ex a tough" stiff nylon and fiberglass composite.
Features:
Injection Molded
Nylon and Fiberglass Composite