Made from durable powder-coated steel with an aluminum alloy cam-locking system, the Headliner Digistand Pro offers the ultimate combination of strength and stability. The cam handle and tensioning knob are used to easily adjust the stand to the perfect position while performing. The cam handle can be pressed down to engage clamping force and lifted to release. The tensioning knob adds or reduces tension on the internal truss rod to apply more or less force to the cam locking system, so you can customize it to the best feel.