These fishing bobbers are made of hard EVA, which is durable and non-deformable. They will provide service for a long time. The floats can keep the bait suspended above the bottom at the desired depth. Buoyant colors made them excellent strike indicators. Spring fixed design allows for quick and easy depth setting. The weighted clip design will ensure float straight down and it can improve your casting distance and performance. There is a push button on the top of the float and line clip on bottom. You will find these floats easy to install. The size options are 0.8 inch and 1 inch, which can greatly meet your fishing needs.