As I said earlier the 9 spline is a Uniglide cassette. As for the other all Shimano freewheels take the same remover - yours probably does not fit because the low-end provider of the hub for that Huffy wheel spec'd a spacer (or whatever that is in the center) that does not allow sufficient clearance for the remover. You will have to disassemble the axle in order to remove the freewheel.

The FR-5 is a Hyperglide cassette lockring tool, not a freewheel remover. Again, you would be well-served to educate yourself about freewheels and cassettes.