SPREADERS 

Spreaders are used to separate your lure from your weight when trolling or casting. Unlike cheap, imported spreaders, I craft each one with 3-100# crane swivels and 2 heavy-duty Duo-Lock snaps. I have found that the 90º spring some manufacturers use is unnecessary as the spreader must be straightened after fighting a fish, whether the spring is there or not. Plus, a spreader without the spring creates less drag and turbulence in the water.

WHY SHOULD I USE A SPREADER?

Trolling:

Spreaders lend directional weight and stability to keep the weight 

and lure separate when using a dropper weight.

Plunking:

Preparing to cast:

A spreader keeps the lure separate from the weight.

Through the air:

The spreader prevents the leader and lure from wrapping the mainline as the weight is pulling them through the air.

Entering the water:

The increased resistance will make the leader and lure wrap the mainline if you do not use a spreader. Once the weight hits the bottom, the spreader keeps the lure separate from the mainline.