Fluted knobs are among our most popular and versatile designs. The efficient fluted design makes them easy to grasp and turn. The durable thermoplastic construction and modern styling make them perfect for a variety of both consumer and industrial uses. We offer three different sizes suitable for all applications from miniature to heavy-duty. Inserts are available as both male and female, either blind or thru-hole. Metric and locking inserts are also standard. Insert materials include steel, brass, stainless, and aluminum.