This set of brackets secures either the 4'' LED Light Cube MX85-WD / 12V / Wide Beam - by Osram or 4'' LED Light Cube MX85-SP / 12V / Spot Beam - by Osram to the Front Runner Roof Rack. These brackets allow fitment of these light cubes to the Front Pillar Brackets in Jeep Wrangler JL 4 Door (2017-Current) Extreme Roof Rack Kit - by Front Runner. Compatible with Jeep Wrangler JK 2 Door (2007-2018) Slimline II Extreme Roof Rack Kit - by Front Runner and Jeep Wrangler JKU 4 Door (2007-2018) Extreme Roof Rack Kit - by Front Runner, add Jeep Wrangler JK/JKU Windshield Spot Light Brackets - by Front Runner.* The mounting brackets secure this light cube on the front of your Rack by using the top T-slots of the front combined slat profile or side placement by using the T-slots of the side profile. All components are made of 3CR12 Stainless Steel and sealed with the same durable, weather-resistant black powder coating as the Front Runner Roof Racks. Includes all installation hardware and fitting instructions. *Note: Additional securing brackets (Jeep Wrangler JK/JKU Windshield Spot Light Brackets - by Front Runner) are sold separately.