This video from Florida, USA says about itself:
Squirrel Proof Bird Feeder?
12 July 2017
Practical review of Woodlink Absolute Squirrel Resistant Bird Feeder Model 7533.
This is the Woodlink Absolute Squirrel-Resistant Bird Feeder Model 7533 – It has a feeder perch on only one side and holds a lot of seed. I got it so I could leave a large amount of seed for the Florida Backyard birds when I’m traveling for long periods and they won’t run out of seed or have the squirrels eat all the bird seed. There are two other models – a larger one with feeders on both sides and a smaller one with a feeder on one side.
This one is heavy – well made and attractive and it forces the birds to one side so I can always see them feeding. Note that it is “Squirrel Resistant” not squirrel-proof – I’m not sure anything can be totally squirrel-proof!
These feeders uses weight adjustable perchs that shut off the access to the seeds whenever anything heavier than birds sits or pushes on it. I have it set a little heavy so as not to exclude any birds – just squirrels and larger. Generally it works great and I am quite happy with this feeder.
Squirrels immediately began attacking it of course and the weight limiting perch works well, but the squirrels found two ways to get a small amount of seed out of the feeder – one was to hang down off the roof for a bit, which is pretty slippery and carefully eat some of the seeds without touching the perch mechanism or try and scoop some seeds out of the feeding holes so they fall on the ground and then they get it later. Most of the time the squirrels slip off the roof and fall to the ground after getting a small amount of seed this way. After awhile they get bored with the small reward for all the work and move on to something else and come back and test it periodically.