With so many companies selling nail guns, it can be difficult to know which type of nail can be used in any particular tool. Believe it or not, it used to be worse. Back in the day, every manufacturer tried to make unique nail designs to force customers to buy their brand of nails. So, if you owned a Bostitch nail gun, you had to buy Bostitch nails. It’s better today, but finding the right nail for the right tool can still be confusing.