Finally, a truly squirrel-proof suet feeder! This weighted feeder uses the same technology as the rest of the Squirrel Buster line of feeders to deny feeding access to squirrels. Holds 2 standard sized suet cakes. Adjustable spring allows user to change the sensitivity of the outer cage based on what they want to keep off (or not) of feeder. Lifetime Care. Brome Bird Care.