Ball knobs come in a large variety of different materials and sizes and are commonly used on applications that have up-down and right-left directional movement. They are also used for tightening, fastening, and pulling on an object, which make them a perfect choice for control levers. Their round design makes for an easy and comfortable grip no matter the material.

• Knobs are black molded plastic With brass threaded inserts or
  
• Solid steel ball with tapped hole
  
• Full thread depth 1 1/2 times thread diameter
  
• HBP 21, 22, and 24 have molded threads and no insert