The pins are round brass rod with either an outside diameter of 2.5mm or 2.2mm (subject to manufacturing tolerances).
 
This product is for building a custom 111mm Scale Lock Swiss Army knife with sufficient length to allow for building. You will need a donor (or more) 111mm Scale Lock Swiss Army Knife to create your SAK. This product does not include any SAK parts.
This is not for liner lock models. Please see other listing.
Building a custom 111mm Scale Lock SAK takes time, skill and patience and it is highly likely that you will make mistakes when attempting this at first.
Disclaimer: This website takes no responsibility for any injury or breakage of these parts when used by the customer as there are so many ways for the custom SAK builder to break or damage these parts during construction.