When I saw these on https://www.arceurotrade.co.uk/Catalogue/Workholding/Machine-Vices/Hold-down-Clamps I knew I had to remake m fitting for mine 🙂
my vice/vise 
adjusted to 11mm 
1 down, 1 more to go 
and then there were 2
4x 0.25mm steps with a 12mm 4 flute end mill @~3000 rpm:
