We bought mop for floor cleaning and the handle is made with 3 segments as "tubes or pipes". And the connection between those tubes is secured by small plastic pegs. 

Sadly we were missing one peg so I recreated one in Blender.

I am also including the .blend files in case someone want's to modify it.

I printed it on MK3s at 0,2mm without supports and with 5 perimeters (maybe it's overkill but it's also small model).