Came in 3 different sizes. I wish I could just get the larger two sizes, but cheap enough that I'll buy more of these packs just for the ones I use.
Standard thread size, works with the We R Memory Keepers - Classic Leather posts.
Good threads. Not like cheap aluminum ones I've used that are hard to screw in.
I dont know why I bought them but I sure I can use them for another project. They are neet to play with too.
I really like this product and I bought it in conjunction to the 3mm posts. I will purchase these again and again.