I think they are a bit light for a sprocket circlip, but they won't break.
My pair are more than fifty years old and been used a lot and are still doing the job.
Oh yeah. I've got a set of those. I think you'll find they are fairly small tips, good for piston circlips and brake cylinders, circlips about fifteen mill diameter. They'll do a sprocket circlip though.
They'll be 0.047" which is close as to 1mm.