I see that newleaf made many guesses,

looks like it fits into something

No

it does release a result from within something. 
pushes something out?

No ... 'releases' ... in the sense of sculpture technique. 

a bit of photo equipment.... an extention for

No, Not photo equipment; No not an extension ... it is the entire tool for the task.

reflectors or even focus ... unberella?

No, No, No. 

Very interesting guesses ... please try again ...

--
Martin