The Ohmite 5003-10E finger-grip knob with pointer is a crucial component for controlling rheostats and tap switches. This knob, with its 23/8" length and 1/4" hole diameter, provides a comfortable and precise grip for adjusting resistance levels. It's designed to be fastened to shafts using slotted set screws, ensuring a secure and reliable connection. This hardware is commonly used in industrial control panels, laboratory equipment, and other applications requiring fine-grained resistance adjustments.