Can you identify these?

[Chrism3]

526944Found these at my late brother's house. No idea what the tool is that's missing, and not sure what the nozzles might be for - irrigation? They appear to all have the same aperture.

[Chief Tiff]

The missing bit is a laser pointer on a key ring; all those attachments are lenses which shape the beam into things like arrows, smiley faces, cross-hairs, circles etc.

[Chrism3]

Many thanks!