Torpedo shape lead body with a barrel swivel in each end. Tie it in the line that runs through your float. This way the weight will be below your float, when fishing it. This will keep your float straight up so you can read any changes or movement in you lure or bait also a good choice depth controll when trolling spinners. When the bobber goes under water your on a fish or rock. Good luck, it's fun to float fish. Try it you'll like the control.