Metal Screws are a building component in Polycraft. They can be made using 11 ingots of almost any Hard Metal, with the exception of Bronze & Brass. Examples of hard metals that make metal screws include Iron, Nickel, Tungsten, Antimony, and Titanium. Of the eleven ingots, 9 need to be used to create a block (forming the head of the screw) followed by stacking the two additional ingots beneath the head (forming the body of the screw). Metal screws are used in a variety of things, such as making the machining mill.