1625PCS Black Hex Button Head Bolts

This is a nice assortment of a single size.

Excellent quality. No black soot or greasy mess. Also, they are true oxide. Not just spray painted like most of the screws I have bought on Amazon. It’s a good size collection. They are easy to use and it’s a great value. It’s comes with all the sizes you will need for 3d printer projects

Great set for 3d printing projects!

A lot smaller than I expected, good quality and it’s probably my own fault for not looking at the size of them in the description.

Huge assortment of screws. Perfect for 3d printing projects. very clean and well put together assortment

This kit has become my go-to-kit for my metric screw selection!

They're kind of cheaply made, and although it's not their fault, They are incredibly small. The reason why I point this out is that all of the bolts and washers are so thin and tiny that there's no wonder they can't be better made.

I do a lot of 3d printing and you can never have too many of these around. I am now at the point I always buy these sets they just make is so much easier than buying individual sizes.