I'll post a Photo when I get home but the barn I'm at has these handy nozzles on some of their hoses.
They are grey and yellow with a spring on the end. About 5in long. The yellow part is a switch to turn it on and off and that is at the bottom part of attachment. Then the long piece that has the spring on it to another screw on part to attach a hose head. The twist on part is also yellow plastic.
If anyone can link me to these that'd be awesome!!
Clancy 17hh chestnut Dutch WB, '99. Owned and loved since '04 and still goin'!