Twin nozzle jet holder 1/4" female screw thread to 2x 1/4" female screw threads, can be fitted straight onto the end of a standard 1/4" lance.  This is used when two different nozzle sizes or different width fan jets are required for different jobs.  Simply with a flick from side to side you change from one nozzle to the other.

Note: Requires nozzle (not included)