The double-spin pyramid pattern has become very popular in recent years and has landed numerous HUGE largemouth for professional fisherman around the US. Here's how you make it:

A) The Basic Pattern
The pattern consists of 5 lengths represented by lettered lines in figure 1 of the diagram below. You will notice that the pyramid shape is symmetric, meaning that the left side is a mirror image of the right.


The lengths in the pattern above have the following relationships:
a is one and a half times as long as c (a = 1.5 x c)
b is twice as long as c (b = 2 x c)

B) Forming the Wire
To form the spinnerbait, you will first need to decide how long everything will need to be. To do this, start by selecting a hook/head for your spinnerbait. Measure the straight line length from the tip of the head to the tip of the hook:



Making the eye: Let's assume that the hook/head length [c] is 1 inch. Now we need to make sure that the distance from the head to the line eye is also 1 inch. So we measure out 1 inch from the head and then form the wire to make the eye.

Making the arm: The length from the tip of the head to the tip of the blade arm [b] has to be twice as long as the hook/head length [b] (remember that b = 2 x c). To do this, we put our tape measure against the head and then we bend the arm until it meets our ruler at the 2 inch mark. Now, the distance from the head to the tip of the arm is twice as long as the distance from the tip of the hook to the tip of the head. (Note: do not cut the arm yet, you still need to attach the blades!)

Attaching the blades: We need to select two blades that are roughly the same length (or smaller) as our hook/head length [c]. Attach the first blade to the tip of the arm. Let the blade hang down against the arm. Attach the second blade at the exact spot where the bottom of the first blade touches the shaft.