There are different sizes of punching forks, from 6mm to 2mm of separation among them, take a look to this item in amazon, from here you can look up for one with the suitable size amazon
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Prong Punch Tool Set, 3pcs ...
Revolving Punch Plier Kit, XOOL Leather Hole Punch Set for Belts, Watch Bands, Straps, Dog Collars, Saddles, Shoes, Fabric, DIY Home or Craft Projects, Heavy Duty Rotary Puncher, Multi Hole Sizes Make