Ohmite's 5109AE finger-grip knob is a crucial component for controlling rheostats and tap switches. This knob, featuring a pointer, provides a secure and ergonomic grip for precise adjustments. It's designed to be fastened to shafts using slotted set screws, ensuring a reliable connection. Compatible with models H, J, G, K, and L, the 5109AE is a standard hardware component for industrial control systems and equipment requiring variable resistance adjustments.