What are these called?

[RIN]

I'm trying to find replacements for these items which hold the strap on our seat squabs but having no luck as I don't know what they are called. Can anyone enlighten me or point me to somewhere on the tinternet I can purchase them?
Regards
Richard

 

[Will_M]

google: plastic cam buckle

 

[Jamie Dundee]

Similar to these?

 

[RIN]

thanks all - lots of black ones but have yet to find a white 1"

 

[Rocksteadee]

Have heard similar called “over centre clamps”

 

[rogerthebodger]

white plastic cam buckle - Google Search