The "Wing-It" type are both aero- and hydrodynamic; ie they cast 1/3rd farther than most other bobbers using a given weight AND require less force to submerge than conventional bobbers. Lastly rig a "Wing-It' and then any other bobber you wish, set a bucket out and from equal distances try 5 casts to get the bobbers INTO the bucket...the "Wing-It" type is far more accurate because of it`s dart like (aerodynamic) shape...