<< For any of the sand I like the Danfort, small sizes and light weight hold
anything. They provide boat size estimates. The high tensile could be
considered at extra cost (sharper, precision yields higher holding for the
weight) or you could just get a larger standard. Copies abound but I can't
evaluate them >>
A real 4.5 lb hi tensile danforth will hold where a 4.5 lb knockoff will not.
Due to currents and wind in keys I would recommend a regular 8lb danforth.
A 4.5 lb will work ok for a lunch hook. But, when wind and current conspire
it may not hold.
SF