Protruding cables makes it impossible to close the rack door. With LiyaTech Rack Recessed Adapter, it will provide you with more flexibility and option in managing your server rack. With the adapter installed, you will get a groove 3.1 in. (8 cm) from the front of the rack, give you extra space for cable management and other equipment. The rack door will be able to operate without any issue with the recessed space. The adapter is made of 2 mm thick cold-rolled SGCC steel with black finish. Each package includes 2 brackets and 4 10-32 screws. The adapter is designed and manufactured in Taiwan.