L-Shaped Surface Bracket (for use with Adjustable Arm & Horizontal/Vertical Tenon Mounts). The WM-4 steel bracket is designed for mounting to a wall or to the side of a wood pole. The bracket provides a 2-3/8" (60mm) O.D. elbow tenon to mount a luminaire. The 0.25" (6mm) thick steel backplate provides wiring access. If surface wiring is required, consult factory. For mounting the bracket to the wall, use only 3/8" (9mm) diameter bolts. Mounting holes are spaced 3-1/4" (83mm) apart. White finish.