need help to identify these please

[luckylee]

can any one help with these plese, i have been given some of these, and they look like some kind of rivit, if so can any one tell me what tool i need to set these please.

028 by lucky_lee, on Flickr
thanks in advance.

 

[smokie999]

look like double cap rivets ,see tandy catalogue think they have tham

 

[Tadpole]

single cap rivets, double caps have domes on both ends

 

[luckylee]

tadpole i have sent you pm regarding the tool to set these.