Stiff, no-scratch bristles aid you in heavy-duty scrubbing tasks. Handle with finger notches helps improve comfort. Lanyard hole enables hang-hook storage. Nylon bristles. Bristle Material: Nylon Bristle Length: 2 1/2 " Brush Length: 5 1/2".BWK4408. 4408. Boardwalk Boardwalk Utility Brush.