The Grease Ball Thruster Nozzle 1/4" with QR-B Protective PVC Skirt has 8 rear jets at 20° and no forward jet. The round head will bury into a choke and the rear jets fill break and disperse choke. 
Application
Designed for thrust, this nozzle will power up the line. It will bury itself into grease, fibrous roots and other soft chokes. It will also descale greasy lines. Good for long lines and sand, mud and silt.