Why would you use a Bimini? If you are using light line (fly, plug or spin) and you attach it to the fly or lure, the knot will almost always be weaker than the main line. But a Bimini forms a loop (two lines), and now you can attach the lure or fly with two lines or make a knot that will be stronger than the main line. If you fish for sharp-toothed fish or a species such as snook that has a sharp gill cover, the thin main line will soon part. You can attach a piece of wire or heavy mono as a shock leader with a Bimini, and the connection will be stronger than the main line.