This is a 4.7" Riser with a Lock Screw for the Litt LED Signaling System, from Yellowtec. It allows you to mount the Litt Base Controller at an increased height of 4.7" off the mounting platform. The included lock screw will allow you to twist-lock the Riser to the Base Controller so that the two are harder to take apart. An additional component – the Litt Mounting Flange, sold separately – is required to attach the Riser to a desktop-type mounting platform. To give the Riser a better aesthetic appearance, you can also add an optional Litt Spoiler.
Featuring a clean, solid-aluminum design, the Riser is built to match the Litt LED Signaling System in robustness and aesthetics.