Very simple to use. Just twist the float to lock it right onto the rope. This will prevent it from moving on the rope when in the water. Handi-Lock Floats are made of linear polyethylene treated with chlorine inhibitors and ultraviolet stabilizers for durability and long life. The self-locking feature fixes on line without additional expense of float keepers. There are three sealed compartments for optimum buoyancy in case of puncture. Available in your choice of color combinations. The colors have excellent visibility and will not fade. Colors Available: Blue/White/Blue, Orange/White/Orange, and Red/White/Red, and Red/White/Blue. Floats are 5 x 9 inch and are made to accommodate 3/4 inch or 1/2 inch rope (either hollow braid, or twisted rope).