Slip floats do as the name implies. They slip on the line to a predetermined stopping point, allowing you to fish any depth you desire. Most floats can be used as slip floats. Any float with a central hollow core from top to bottom will serve. To rig the slip float, you need only two additional items – a bead a stopper .
To rig your slip float first attach a stopper to your mainline. Next thread your mainline through a small bead. Then thread your mainline through the hollow tube of your float and attach a swivel in the usual manner.