This is Titans Part Number 4821800. This angled mounting bracket is for Titan Brake Rite Electric Over Hydraulic Actuators. On each Actuator, there are 4 Mounting Holes on the bottom side of the housing. This Angle brackets purpose is to provide a secure mounting location for your Actuator on your trailer. The exact mounting location for this bracket will depend upon your specific type and design of trailer. This metal plate has pre-drilled holes for both the mounting holes on the Actuator Housing and for mounting to your trailer. Mounting Hardware not included. The 4 Hole Side is the Side for the Actuator Housing, the 6 Hole side is the correct side for mounting to your trailer.