More precise than analog potentiometers, these have a three-digit display that is easy to read.

Create a seal around a potentiometer shaft to keep out moisture and dust.

Often used in large, open workspaces, these switches can be wired on opposite ends of the room to control the brightness of lights on the same circuit. They're also known as three-way switches.

Use these controls with motors that run forward and backward, such as motors for conveyor belts.

Control devices with round or D-shaped shafts and view settings at a glance with a pointer.

These dual-control knobs operate independently to control two settings. They have a rubber coating for a comfortable grip. Use them on devices with round shafts to view settings at a glance with a pointer.

To build a custom precise-control knob or thumb screw, pair one of these knobs with a socket head screw. Turn the knob to move the screw 0.005" per graduation and make precise adjustments.