A well shielded control cavity can, in many cases, reduce noise, humming and RF interference.
We recommend a well shielded cavity when installing any of our electronics kits, and this kit in addition to our Aluminum pickguard shied is especially recommended for strats.
You get 6 pieces of solid copper foil- in 1/2", 1" and 2" wide pieces. The self stick adhesive is electrically conductive, so overlapping pieces will make good electrical contact. The 6 9" long pieces should be more than enough to tackle any control cavity, and it is very easy to work with, your only tool a regular scissors.