You can purchase new dimple dies, flat squeezer sets, and cup rivet squeezer sets without spending a lot of money. Used ones will save you some money but have never seen anyone sell the ones they used. The standard hole / shank size of these sets is 3/16" or 0.1875".
Gary A. Sobek
NC25 RV-6 Flying
3,500+ hours Where is N157GS Building RV-8 S/N: 80012
To most people, the sky is the limit.
To those who love aviation, the sky is home.