These rugged tapered knobs are four times more impact resistant the standard phenolic knobs. The contemporary satin finish provides a "no-slip" grip while hiding scratches, dirt, etc. so knobs look new in the field longer. Perfect for a wide variety of gripping and shift applications. Inserts are available as both male and female. Metric and locking inserts are also standard. Insert materials include steel, brass, stainless, and aluminum.