A float is usually used as a bite indicator when fishing for fish.
Mainly whitefish such as carp, bream, rudd, roach, tench, etc.
The float fulfills several purposes. First, it serves as a bite indicator. The float is visible to the angler on the water surface; If a fish bites and floats with the bait, the float will inevitably move and may be dragged under the water surface.
Another purpose of a float is to set the bait for a specific, to be treated water depth (just above ground, in the middle water or in the water surface area). This is done by slidably placing the float on the fishing line, but so tightly that the line can not be pulled down by the float or bite pressure through the float. By varying the distance of the float to the baited fishhook, it is easy to adjust whether the bait is available in open water, floating above the ground or lying on the ground. Incidentally, the position of the float also always shows where the bait is.
Floats are offered in specialist shops in a wide variety of colors and shapes. Depending on the bait size one chooses poses with high or less high load capacity.
Leaning of bait and buoyancy of the float pull this last batch of fishing line linear and vertical. Weights, at least formerly of lead, in the simplest form in the form of balls (with gap for pressing on the leash) strengthen this tension and help in ejecting the leash by increasing the flywheel.