Open the door and stand with your back to the hinges.
How to fit a bathroom door handle.
Next fit the door lock in the hole and screw it into place.
The process is simple given the right tools you should be able to install your new lock in around an hour or so.
Fitting the door handle.
If the doorknob is on the left you need a left handed door.
This video will show you how to replace a lockable bedroom bathroom doorknob or door handle.
Now you should be able to place the handles and lock turn button which forms part of the handle against the door face and fix correctly using the screws etc provided.
Begin by removing the screws from the door knob on the interior side of your door.
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Drill two holes through where you made the marks.
This is a complete video featuring the removal of the old doorknob and the installation of the new one.
Remove the two screws from the latch plate on the edge of the door and remove the latch from the opening.
Place the door lock against the face of the door on both sides and pencil in the hole on the door lock where the door handle has to be drilled into.
The strike side the side with the lockset of these doors has a beveled edge so the door can swing freely.
This allows you to pull the door knobs off the door from both sides.
However this all depends on whether you are replacing an existing handle or fitting it to a new door.
In some cases door latch plate mortises might need to be cut or enlarged.
If the knob is to the right select a right handed door.