Central Mounting: This through-the-door method requires no tools; the switch mounts with the supplied mounting ring, handle and adapter tab (which allows mounting in holes with diameters of either 22.5 mm or 30 mm). The handle and adapter tab mount on the outside of the door; the switch and mounting ring inside.

Central Mounting, Locking Lever

Central Mounting, Locking Rotary Handle

4-hole Mounting: Four screws go through the door, securing the front of the switch to the inside of the door and the handle/lever to the exterior.

4-hole Mounting, Locking Lever

4-hole Mounting, Locking Rotary Handle

4-hole Mounting, Standard Lever