You can very the lenth to the depth of the water you fish in. If the fish is closer to the surface feeding on baitfish that jumps out the water you make the two lines 50-70cm. I usally make the lines a meter long. This wil get your bait down 2meter under the surface. What is nice about this rig is that you got direct contack with the fish when it grabs the bait and thus your strike wil not be handicaped by the flout. You can use a livebait with great sucsess with this rig to, for ither Garick or Spanich Macrell.