Spring dimensions are shown in the additional photograph.

 Circlips are 13.8mm internal diameter (to fit a 15mm shaft with a 14.3mm groove). 

When replacing a door handle spring the two most important things to check are a) The orientation of the external hook compared to the internal hook eg. is it a 2-turn coil or a 2.5-turn coil and b) the thickness of the spring (we define thickness as the height of the spring when laid flat). 

Most springs are retained with a circlip, which can be removed and replaced using external circlip pliers. 

The 2.5-turn, 2.5mm thick coil shown here is the most common type of door handle spring.

 Please note that if you fit a thinner spring than originally fitted the handle will have some excess play. If you fit a thicker spring than originally fitted it may be difficult to replace the circlip and the handle may have a tendency to stick. 

The circlips included are the most common size, as used in the vast majority of door handles.

 If you wish to check the size of circlip for your handle it is better to measure the shaft rather than the old circlip as some poor quality circlips can become distorted. 

 Tip: When fitting a new spring a little grease will give better wear and movement.