The RAGGTOPP™ Premium Convertible Top Brush is manufactured using NYLEX® bristles that are soft enough not to cause damage, but strong enough to fully clean your convertible top. Also, this brush is endorsed by the Haartz Corporation. They are a leader in the manufacture of convertible top material. The round wooden handle is about 4 inches. Perfect for the palm of your hand. This brush is designed to be not too stiff, and not too soft. It's design has the right bristles and the right handle.