The FiberRunner QuikLock Adjustable Cabinet Bracket is used to support the 12x4 system, dual 6x4, or dual 4x4 systems by attaching to the top of the cabinets. It features two-position height adjustments to accommodate systems with or without a hinged cover. This helps allow runs to be leveled over uneven cabinet heights. It is secured to the cabinet frame with trough bolts (not included). The pre-assembled slide clamps enable fast assembly to the channel.