We are EJS, We make Screws

What's the first thing popping up in your mind when you hear the word" SCREW"?

How big can a screw be?

To most people, when we know this word, it's related to furniture, we see them every where, even the kids know this from their favorite toys.

However to plastic people, especially to machine people, injection molding machines and extrusion machines, it's about big screws which are used for feeding or plasticizing.

They're big and long, diameter of 90mm is small, 2 meters long is short.

When they are packed, they're like trees lying on the ground.

We made screws with diameter of 560mm.

We made screws in one piece with 9meters.

What's size for these screws?

Can you have a bold guess?