Fill and Camouflage Screw Holes
First, remove the existing hardware by loosening the screw on the back of the door while holding the old hardware in place. Find a shade of wood-filling putty that best matches your cabinet.
To cover holes on wood grain, plan to buy three shades of putty -- one that matches the lightest and darkests wood grains as well as one halfway between them.
Mix a pinch of each of the three shades together until you have a hue that's as close as possible to your original cabinet.
Pro Tip: Let some of the putty mixture dry beforehand to see if the color changes.
Use your finger to apply a pinch of putty to the cabinet where the hole is located. Push the putty into the hole to fill it completely.
Use a putty knife to compact the putty, and scrape the flat edge of the knife across the hole to create a smooth surface.
Use a damp cloth to remove excess putty.
Allow the putty to dry completely. Add more if needed.
If the patched hole color is still not close enough to the cabinet finish, try stain markers and putty pencils to help camoflauge the repair.
Attach New Hardware
Place a template from a hardware-installation kit against the edge of the cabinet, and make a pencil mark in the template's holes that correspond with your handles.
Attach a drill bit that corresponds with the size of your handle's screws.
Carefully drill into the pencil marks, making sure you don't slip and damage the cabinet.
Place the handle on the door front, lining up the holes in the door with the attachment points on the handle.
Insert the screws through the back of the door.
Use a screwdriver to tighten the screws into the handle.