The Mega-Drop Down Slider works with The Light Source Mega-Drop Downs to locate light fixtures along the length of the Mega-Drop Down. Two 1/2"-13 ?1? long Hex Head Cap Bolts both mount the fixture and lock the fixture onto the Mega-Drop Down. A nickel plated, spring steel 1 inch OD Belleville spring washer is provided to act as both a tensioning and locking washer. CNC machined from aircraft grade aluminum