Mounts on the inside corner of the dock frame or on the inside corner of an L-shape dock configuration.
Using a hole saw, the pipe can pass up through the decking if this bracket is mounted inside the frame.
The stainless steel set screws allow height adjustment on 1.5″ schedule 40 pipe legs.
To avoid confusion when buying pipe that fits in this, the industry standard calls the pipe size as 1.5″ schedule 40 but the O.D. is actually 1 7/8″.