Can anyone identify this part of a front door knob assembly?

[Phuilder]

Does anyone have a name is tiny circular part of a door handle assembly? It seems as if it’s designed to attach the door handle to the door handle rose. If anyone can identify it do they also know whether a specific tool is required to fit it? I’ve tried to do it with a little pair of pliers, but it’s been tricky. Any tricks of the trade?

 

[DAZB]

It is called a Circlip (circular clip) and readily available and you fit them with these.....

Circlip Plier Set 5 Pieces - Screwfix

Order online at Screwfix.com. Space-saving circlip pliers with 4 interchangeable head attachments, enabling access from differing angles for assembly and disassembly tasks. FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

Good idea is to wear goggles and take it slowly because if it flies off you could spend the evening looking for it.

 

[Phuilder]

Brilliant! exactly what I needed to know. Many thanks!