They look like crimped clips so not reusable. You could replace with jubilee clips afterwards if you want them to be reusable in future. Or you can get spring ones if they are small enough.
These are called Clic clips - well used in the motor trade and cause less distortion than jubilee clips and take up less space too.
There are special pliers to set and upset these clips .....I got mine from Cromwell tools and they are made by Kennedy.
John
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