Like Al Gore, I thought I invented these but they probably originated a long time ago on Lake Champlain. There are lots of varieties out there. Don't care for the model Tim mentioned---too much blow back. Luhr Jenson ( I believe) came up with the "six pack" with silver metal fish shaped attractors. Captain Werner "Popeye Charters" run them. Captain Lapiano (spelling?) has various designs on his site. I use simple beads, crimps and Cannon terminations. How you arrange the blades and what colors is up to you to have fun with. The top two sample pictures utilizes components from Big Weenies "grease traps". The bottom example is just a simple bead/crimp/90lb wire extension with blades. All are strung on downrigger cable and use a Black's release. These I use when I am fishing alone and have limited rods to run......they pull fish from a long way. I also use these when my daughters are on board in the middle of the day because they catch smaller sized kings, coho and steelhead when the sun is high.....running a spoon with a 5'-7' lead off the release. They take big Kings in the evening......running a spoon with a approx. 10' lead off the release. Now that the three rod rule has passed, I use these a lot less. On the bottom with a jointed stickbait....they catch lakers in the spring also.